Science review 1
x 6
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
x4
What causes night and day (24 hours)?
A revolution
B rotation
b. rotation
3 main gases that make up the Earth's atmosphere (x5)
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
x7
In DNA, who is responsible for giving us the shape of a twisted ladder?
A Rosalind Franklin
B James Watson
C Franklin Crick
D Gregor Mendel
B James Watson
C Franklin Crick
grass....bird .....snake.....hawk
x5
Which is the primary consumer?
bird
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? x7
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 hime to the right
b) the jumper continues to fall down but the wind pushes him to the left
What is a mixture?
a. salt water
b. petroleum jelly
c. water
d. aluminum foil
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 substaqnce changes from a liquid to a gas
x 4
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
x4
Salt water dissolves quicker in cold water by
a. pouring
b. stirring
c. letting it sit still
d. adding a little at a time
b. stirring
Which is the chemical equation for photosynthesis?
6H2O + 6CO2 yields C6H12O6 +6O2
Which of the following animals changes its fur color during the winter to help protect it in its surroundings (x4)
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. decomposing reproduction
Of what are pure gold and pure copper examples:
a. compounds
b. elements
c. mixtures
d. solution
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
x3
If the Earth revolves around the sun for 4 yrs, how many times 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: (x3)
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
Which cellular reproduction like budding produces 2 daughter cells? (x6)
a . sexual reproduction
b. asexual reproduction
c. both sexual and asexual reproduction
d. seeds
b. asexual reproduction
x5
Water from the oceans pounds against a rock for hundreds of years. Eventually a hole forms in the rock. This is known as
a. erosion
b. weathering
c. deposition
d. construction
a. weathering
x 7
What is evaporation?
a . gas turns to liquid
b. solid turns to liquid
c. liquid turns to gas
d. water turns to ice
c. 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
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
What type of substance is water?
a. compound
b. element
c. mixture
d. solution
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? This is known as (x5)
a. runner reproduction
b. sexual reproduction (Meiosis)
c. asexual reproduction (Mitosis)
d. multicellular reproduction
c. 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? (x4)
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
x5
Frozen orange juice is place in a bowl. After a few minutes it begins to melt. What type of change has occurred?
a. chemical
b. melting
c. physical
d. mixture
c. 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.
x3
Which of the following is a physical reaction?
a. lighting a match b. rusting metal
c. baking a cake d. 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
Which part of the atom is positive?
A protons
B neutrons
C electrons
D nucleus
A protons
x5
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
x7
Birds use their beaks adapt to the environment by
a) being able to protect themselves from predators
b. being able to use their beaks to consume food
c. it helps them to build their nest
b. being able to use their beaks to consume food
x5
The temperature is 25 degrees ... What type of weather would you expect
a. rain
b. snow
c. cloudy
d. clear
b. snow
x6
cells...tissue....organs....organs systems
Which level of organization is the most complexed?
b. organ systems
Which statement describes the 2 samples of rock (x7)
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.
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
Which term defines a mixture in which one substance dissolves in another?
a. element
b. mixture
c. molecule
d. solution
x3
Which layer of the atmosphere is closest to the earth where weather occurs?
a. atmosphere
b. troposphere
c. stratosphere
d. exosphere
b. troposphere
x 4
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
x4
A student wanted to look at pond water to see what organisms they could find. Which of the following tools would the student use?
a. balance b. graduate cylinder
c. microscope d. magnifying glass
c. microscope
What units does a triple beam balance use?
a. mL
b. Meters
c. Grams
c. gram
x8
grass.... mice....snake...hawk...
What would happen if the mice were removed from the food
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
a. texture and melting point
b. density and melting point
c. weight and freezing 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
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
x4
In a DNA strand, what base is always paired with A (Adenine)?
A Adenine
B Cytosine
C Guanine
D Thymine
D Thymine
x 3
Tommy wanted to blow up a balloon using a gas called Helium (He) that would make the balloon float. How many protons does Helium have??
a) 1
b. 2
c. 3
d. 4
b 2
x4
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
x5
On a roller coaster, where is the greatest kinetic energy?
a. top of tallest hill
b. bottom of tallest hill
b. bottom of tallest hill
grass......? .......fox
x6
What is missing?
a. snake
b. mouse
c. hawk
d. flower
b. mouse
A ) earth has. a coutnerclockwise rotation
b. Earth revolves around the sun in a counterclockwise motion
Which is the best example of a chemical change?
a. fireworks exploding
b. cutting paper
c. crushing a can
d. melting snow
Which of teh methods listed is not a method used for separating mixtures?
a. sifting b. flotation
c. filtration d. dissolving
x6
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
x 6
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 (x7)
a. asexual
b. sexual
c. seed
d. fish
a. asexual
x 6
grass.....bird.....snake.....hawk
Which is the secondary consumer?
snake
x 6
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? x7
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
Which material is a pure element?
a. alcohol
b. copper
c. salt
d. water
All living organisms are dependent on plants because
Plants are producers
What is the formula for speed?
distance/time
List two reactants of photosynthesis?
Water CO2
What is the purpose of cellular respiration?
Make energy
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
What tool would I use to find the mass of an object?
a scale/balance
___________ are small segments of the chromosome that code for a 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 till 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
What would happen if the oil is put into the water? Float or sink?
Float
This adaptation allows animals to blend in with their surroundings
camouflage
This type of vertebrate uses gills as young and lungs as an adult
amphibians!