Science review 1
How much of the earth' s surface is covered with water?
A) 1/4 B) 2/4
C) 3/4 D) 3/8
C) 3/4
What causes night and day on Earth?
A) revolution
B) rotation
B) rotation
What are the 3 main gases that make up the Earth's atmosphere?
A) oxygen, argon and nitrogen
B) nitrogen, oxygen, and carbon dioxide
C) oxygen, carbon dioxide, and helium
D) carbon dioxide, helium, and oxygen
A) oxygen, argon and nitrogen
In DNA, who is responsible for determining that it was shaped like a twisted ladder?
A) Rosalind Franklin
B) James Watson
C) Benjamin Franklin
D) All of the above
B) James Watson
grass, rabbit, snake, hawk
Which of these is the primary consumer?
A skydiver jumps from a plane. Gravity is pulling the jumper down. A strong gust of wind pushes against the jumper from the right. Which of the following happens?
A) the wind did not affect the jumper and he continues to fall straight down.
B) the jumper continues to fall down but the wind pushes him to the left
C) the jumper continues to fall down but the wind pushes him to the right
B) the jumper continues to fall down but the wind pushes him to the left
Which of the following is a mixture?
A) salt water
B) salt
C) water
D) aluminum foil
A) salt water
What occurs at the boiling point of a substance?
A) the substance changes from a gas to a solid
B) the substance changes from a liquid to a solid
C) the substance changes from a solid to a liquid
D) the substance changes from a liquid to a gas
D) the substance changes from a liquid from a gas
When light shines through a prism it bends. This is also know as
A) reflection
B) refraction
C) absorption
D) shadow
B) refraction
What does the hygrometer measure?
A) wind speed
B) humidity, moisture in the air
C) amount of rain
D) wind direction
B) humidity, moisture in the air
Salt dissolved quicker in cold water by
A) lowering the temperature of the water
B) stirring
C) letting it sit still
B) stirring
What is the chemical equation for photosynthesis?
6H2O + 6CO2 yields C6H12O6 +6O2
Which of the following animals can change its fur color during the winter to help protect it in its surroundings?
A) rabbit
B) arctic fox
C) polar bear
D) reindeer
B) arctic fox
A tomato is considered a fruit because it is produced from a flower and contains seeds. Tomatoes are produced by
A) spore reproduction
B) sexual reproduction
C) asexual reproduction
D) budding
A) sexual reproduction
Pure gold and pure copper are examples of
A) compounds
B) elements
C) mixtures
D) solution
B) elements
Which will best increase the solubility of a tablespoon of sugar poured into a cup of water?
A) heating the mixture
B) stirring the mixture slowly
C) cooling the mixture
D) adding more water to the mixture
A) heating the mixture
If the Earth revolves around the sun for 4 yrs, how many months does the moon revolve around the Earth?
A) 12 B) 24 C) 36 D) 48
D) 48
Which would be an example of chemical energy?
A) a spring compressed
B) a ball rolling down a hill
C) a child sitting at the top of a slide
D) powder on the tip of a match to be burned
D) powder on the tip of a match to be burned
Which cellular reproduction produces 2 daughter cells?
A) sexual reproduction
B) asexual reproduction
C) both sexual and asexual reproduction
D) seeds
B) asexual reproduction
Water from an ocean hits against a rock for hundreds of years. Eventually a hole forms in the rock. This is known as
A) weathering
B) deposition
C) construction
A) weathering
What is evaporation?
A) when a gas turns to liquid
B) when a solid turns to liquid
C) when a liquid turns to gas
D) when a water turns to ice
C) when a liquid turns to gas
A single strawberry plant can produce long stems called runners. When runners reach open ground, they can grow roots and develop into a new strawberry plant. This is an example of
A) sexual reproduction
B) respiration
C) asexual reproduction
D) seed production
C) asexual reproduction
Frank has a beaker with a mixture of salt and water. He would like to recover the salt from the water. Which would be the best method to accomplish this?
A) evaporation B) filtration
C) freezing D) refraction
A) evaporation
What type of substance is water?
A) compound
B) element
C) mixture
D) solution
A) compound
Which cellular reproduction produces 4 daughter cells?
A) mitosis
B) meiosis
B) meiosis
Which weather phenomena forms over warm waters close to the equator?
A) Hurricanes
B) Tornadoes
A) Hurricanes
Which cellular reproduction is for growth and repair?
A) sexual reproduction (Meiosis)
B) asexual reproduction (Mitosis)
A) asexual reproduction
Tommy placed a black, white, silver, and blue can under a heat lamp with a thermometer in each one. Which one of the cans will be the coolest?
A) black, because it absorbs the heat
B) blue, because it wasn't under direct light
C) white because it would reflect light
D) silver, because it is shiny
C) white, because it would reflect light
Frozen orange juice is placed into a bowl. After a few minutes it begins to melt. What type of change has occurred?
A) chemical
B) physical
C) mixture
B) physical
Megan lights a candle and watches it burn. She observes that some wax melts, some smoke comes from the wick, the wick burns, and then the melted was hardens again.
Which represent a chemical change? (x5)
A) Some wax melts, and smoke comes from the wick.
B) Some wax melts, and later melted wax hardens again.
C) The wick burns, and smoke comes from the wick.
D) Smoke comes from the wick, and later melted wax hardens again.
C) The wick burns, and smoke comes from the wick.
Which of the following is a physical reaction?
A) lighting a match B) rusting metal
C) baking a cake D) making sugar water
A) making sugar water
Which is an example of a chemical change?
A) melting ice
B) dissolving salt in water
C) hammering metal into a thin sheet of foil
D) burning a piece of paper
D) burning a piece of paper
Which part of the atom is positive?
A) proton
B) neutron
C) electron
D) shell
A) proton
Oxygen and water chemically combine to make hydrogen peroxide. Hydrogen peroxide is known as
A) an element
B) a molecule
C) a compound
D) a rock
C) a compound
Are sharks mammals?
A) Yes
B) No
B) No
x5
The temperature outside is 25 degrees Fahrenheit. What type of weather would you expect to see?
A) rain
B) snow
C) cloudy
D) clear
B) snow
cells, tissues, organs, organs systems
Which of these levels of organization is the most complex?
organ systems
Two rock samples are placed in water. Sample A floats, but sample b sinks to the bottom.
Which statement describes the 2 samples of rock?
A) sample b has more mass
B) sample a has less volume
C) sample b has a greater density
D) sample a has a higher freezing point.
C) sample b has a greater density
Which list correctly identifies the elements that make up a water molecule?
A) oxygen, hydrogen, nitrogen
B) oxygen, hydrogen, carbon
C) oxygen, hydrogen, oxygen
D) hydrogen, oxygen, hydrogen
D) hydrogen, oxygen, hydrogen
Which term defines a mixture in which one substance dissolves in another?
A) element
B) mixture
C) molecule
D) solution
D) solution
Which layer of the atmosphere is closest to the earth where weather occurs?
A) atmosphere
B) troposphere
C) stratosphere
D) exosphere
B) troposphere
The environmental protection agency wanted to start using an alternative fuel to cut down on pollution. Which fuel would they chose?
A) ethanol
B) natural gas
C) oil
D) coal
A) ethanol
A student wanted to look at pond water to see what tiny organisms they could find. Which of the following tools would the student use?
A) balance B) graduated cylinder
C) microscope D) magnifying glass
C) microscope
What units does a triple beam balance use?
A) mL
B) meters
C) grams
C) gram
grass -> mice -> snake -> hawk
What would most likely happen if the mice were removed from this food chain?
A) The grass would increase and the hawk would decrease
B) The snakes would increase and the hawks would decrease
C) The grass would increase and the snakes would decrease
D) The Hawks would increase and the grass would decrease
C) The grass would increase and the snakes would decrease
Tom needs to choose a material to make a lightweight cooking pot. Which properties should he consider?
A) texture and melting point
B) density and melting point
C) weight and freezing point
B) density and melting point
When 2 oxygen atoms bond chemically with 2 hydrogen atoms, hydrogen peroxide if formed. Which phase defines this substance?
A) an element
B) a molecule
C) a compound
D) a mixture
C) a compound
In which situation is a chemical reaction not taking place
A) salt dissolving in water
B) rusting of an old car in a junk yard
C) burning gasoline in a car
D) digestion of food in our body
A) salt dissolving in water
In a DNA strand, what base is always paired with A (Adenine)?
A) Adenine
B) Cytosine
C) Guanine
D) Thymine
D) Thymine
Tommy wanted to blow up a balloon using a gas called Helium that would make the balloon float. How many protons does Helium have?
A) 1
B) 2
C) 3
D) 4
What separates the inner small, rocky planets from the outer giant, gaseous planets?
A) Sun
B) Earth
C) Asteroid Belt
D) Pluto
C) Asteroid Belt
On a roller coaster, where is the greatest kinetic energy?
A) at the highest point of the ride
B) at the lowest point of the ride
B) at the lowest point of the ride
grass -> ? -> fox
Which organism is missing from this food chain?
A) snake
B) mouse
C) hawk
D) flower
B) mouse
The sun appears to rise in the east and set in the west on Earth. Why does the sun appear to rise and set in this pattern?
A) Earth has a counterclockwise rotation
B) Earth revolves around the sun in a counterclockwise motion
A) Earth has a counterclockwise rotation
Which is the best example of a chemical change?
A) fireworks exploding
B) cutting paper
C) crushing a can
D) melting snow
A) fireworks exploding
Which of teh methods listed is not a method used for separating mixtures?
A) sifting B) flotation
C) filtration D) dissolving
D) dissolving
Which of the following planets are located before and after Earth?
A) Mercury and Mars
B) Venus and Saturn
C) Venus and Mars
D) Mercury and Neptune
C) Venus and Mars
Which of the following are gases?
A) copper, oxygen, nitrogen
B) ice, hydrogen, carbon
C) water vapor, aluminum, carbon dioxide
D) water vapor, carbon dioxide, oxygen
D) water vapor, carbon dioxide, and oxygen
A jelly fish is known to clone itself. It does this by growing buds on its tentacles. What type of reproduction is this?
A) asexual
B) sexual
C) seed
D) mechanical
A) asexual
grass, rabbit, snake, hawk
Which of these is the secondary consumer?
snake
What type of wave is sound?
A) transverse
B) longitudinal
B) longitudinal
Which type of symbiosis occurs between a bee and a flower. The bees pollinate the flowers and the bees get nectar for food?
A) Commensalism
B) Mutualism
C) Parasitism
B) Mutualism
As water evaporates, which best explains the change that is occuring?
A) a gas changes to a liquid
B) a gas changes to a solid
C) a liquid changes to a gas
D) a liquid changes to a solid
C) a liquid changes to a gas
Which material is a pure element?
A) alcohol
B) copper
C) salt
D) water
B) copper
All living organisms are dependent on plants because
Answers will vary.
Plants are producers.
Plants are food.
Plants produce oxygen.
What is the formula used to calculate the speed of an object?
distance/time
What are the two reactants required for photosynthesis to occur?
Water and Carbon Dioxide
What is the purpose of cellular respiration?
To produce energy (ATP)
The letters AA would represent a _____________ genotype.
homozygous
The arrows in a food chain show the flow of _______.
energy
In humans, how many chromosomes do you get from each parent?
23
Name one tool that can be used to find the mass of an object.
Scale
Triple Beam Balance
___________ are small segments of the chromosome that code for specific traits.
Genes
What is the original source of energy in all ecosystems?
the sun
All living things contain at least one _____.
cell
How many days in a revolution around the Sun?
365 1/4 days
What causes the four seasons (fall, winter, spring, and summer)?
The tilt of the Earth as it orbits or revolves around the Sun.
Water has a density of 1 g/mL. Oil has a density of 0.61 g/mL.
Would the oil float or sink if it is placed into the water?
Float
What is the adaptation called when an animal is able to blend in with their surroundings?
camouflage
This type of vertebrate uses gills when they are young and lungs when they are an adult.
Amphibians