Science review 1
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100

Which type of energy is stored up, and increases when the distance above ground (height) increases?

Potential

100

Give an example of a chemical change (chemical reaction)

Random Answers that may include: Burning stuff, changing the molecules permanently

100

Give an example of a physical change

Random answers that may include: bending, cutting, or melting something, but not changing the molcules in a permanent way.

100

Is this an example of a compound or an element?

Gold

element

100

grass--->bird--->snake--->hawk

which is the primary consumer?

bird

100

A person jumps out of an airplane and does not deploy his/her parachute. Which type of energy is increasing as he/she falls towards the ground?

kinetic is increasing and potential is decreasing

100

Which of these is/are a molecule?

NaCl (salt)

H2O (water)

Aluminum

Oxygen

NaCl (salt) and H2O (water)

100

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

d . a substance changes from a liquid from a gas

200

How many days pass between moon pahses?


3.5 days

200

What is the formula for density?

d = m/V

200

What does the Law of Conservation of Mass say?

Matter is never created or destroyed, but transformed into a different form.

200

What is the formula for finding density?

mass divided by volume

200

What is the process by which plants make energy from the sun?

photosynthesis

200

What are the PRODUCTS of photosynthesis?


oxygen and glucose (sugar)

200

What elements is this molecule made up of?

CO2

Carbon and Oxygen

200

What color staars are the hottest

blue

300

How many elements are in this molecule?

C6H12O6

3

300

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

d. powder on the tip of a match

300

Where do all living things on the earth originally get their energy from?

The sun

300

What is it called when the earth heats up too much and the glaciers start to melt?

Global Warming or Global Climate Change

300

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

300

Which has more mass?

A) A ball pushed with a force of 200N accelerating at 2m/s2

OR

B) A ball pushed with a force of 100N accelerating at 5m/s2

B

300

What do all the elements in a period have in common?

# of energy levels/rings

300

Which of Newtons Laws is represented here?

A ball hits the baseball bat and it gets flown out of the field

3rd law

400

What type of organism is the most abundant (more of it) in any ecosystem?



producers

400

Which direction does energy flow in a trophic food/energy pyramid?

From the Bottom to the Top

400

What are the 7 evidences of a chemical change?

Odor

Color

Precipitate

Gas

Temperature change

Light

New Substance

400

 Which star color will be the coolest?

a. black, because it absorbs the heat

b. blue

c. white 

d. yellow


yellow

400

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. sublimation

c. physical

d. mixture

c. physical

400

What is the unit for energy?


JOULE

400

Which of the following is a physical change?

a. lighting a match               b. rusting metal

c. baking a cake                   d. making koolaid

d. making koolaid

400

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 

500

What type of tide would we see when there's a New Moon?

Spring Tides

500

What is the energy of motion called?

Kinetic energy

500

Which of these is NOT a compound?

H2O

CO2

Ca3

LiN

Ca3

500

What is the average speed of a car that went from Houston to Dallas (240mi) and took 3 hours to get there?

80mph

500

What moon phase will we see from Earth after this one?


1st quarter

500

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 has a greater density

500

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

500

What is the total number of atoms in this molecule?

C6H22O6

34

600

How many atoms of hydrogen are in 3 molecules of H2O (3H2O)?

6

600

Only 10% of the energy is used when going up each level of a trophic pyramid.

Where does 90% of the energy go when going up the trophic pyramid?       

90% is lost as heat to the enviornment

600

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

600

What type of energy is food or fuel?

chemical

600

 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) grass would increase and the snakes decrease

600

Which of the following are physical properties?

density

melting point

flammability

explosive

reactivity

density and melting point

600

What elements are stars mainly made up of?

Hydrogen and Helium

600

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

700

Which of the following is the LARGEST/HEAVIEST atom?

A) Hydrogen

B) Oxygen

C) Lithium

B) Oxygen

700

What type of galaxy is this?

Elliptical

700

What is the formula for water?

H2O

700

If I exhert a force of 100N to the left on a box and my friend exherts a force of 200N to the left. What is the net force on the box?

300N to the left

700

grass......? .......fox


Which organism is missing from this food chain?

a. snake

b. mouse

c. hawk

d. flower


b. mouse

700

How many hydrogen atoms are in 4 molecules of NH4?

16

700

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

700

What is the name of the cloud of dust and gas where stars are born?

Nebula

800

What is the main function of the excretory system?

a) oxygenation 

b) moving

c) getting rid of waste

d) protection against disease

c) getting rid of waste

800

What are the organelles that plant cells have that animal cells do not?

chloroplasts and cell wall

800

What are the reactants of photosynthesis?


Carbon dioxide, water, and sunlight

800

grass --->bird--->snake--->hawk

Which is the secondary consumer?

snake

800

What is the reason that Hurricanes spin in one direction in the Northern Hemisphere and a different one in the Southern Hemisphere?

The Coriolis effect

800

Look at a periodic table to find this answer...

How many protons are in an atom of carbon?


6

800

What is the charge of a neutron?

neutral=no charge

800

Which material is a pure element?

a. alcohol

b. copper

c. salt

d. water

b. copper