Science review 1
Which type of energy is stored up, and increases when the distance above ground increases?
Potential
Give an example of a chemical change (reaction)
Random Answers that may include: Burning stuff, changing the molecules permanently
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.
Is this an example of a molecule or an atom?
Gold
atom
grass....bird .....snake.....hawk
which is the primary consumer? Hint: Who just eat the grass.
bird
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
When light shines through a prism it bends. This is also known as
a. reflection
b. refraction
c. absorption
d. shadow
b. refraction
How would you describe the relationship between volume and density?
Inversely Proportional
What is the process by which plants make energy from the sun?
photosynthesis
What are the PRODUCTS of photosynthesis?
oxygen and glucose (sugar)
Which of these is a mixture?
A. carbon dioxide
B. water
C. salt water
D. sugar
C. salt water
What type of graph would you use to plot continuous data (ex. time vs temperature)
a. bar graph
b. line graph
c. pie chart
d. none of the above
b. line graph
Where do all living things on the earth originally get their energy from?
The sun
As the atomic number of an atom increases, generally what happens to the atomic mass?
a. it increases
b. it decreases
c. it stays the same
a. it increases
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
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. reflection
c. freezing d. refraction
a. evaporation
What are the some evidences of a chemical change?
Odor
Color
Precipitate
Gas
Temperature change (sometimes light and sound)
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
object 1= 15 g object 2= 30 g
Which object must you apply more force to in order to move it?
object 2
x6
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
What is the energy of motion called?
Kinetic energy
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
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
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
Through which phase of matter does sound travel fastest?
solid
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
Which of the following is the LARGEST atom?
Hydrogen
Oxygen
Lithium
Oxygen
What can you do to get a mylar balloon to float again once it has deflated?
Heat it up to increase the volume and decrease the density
What tool should you use to determine the mass of an object?
balance
grass......mouse .......fox...... snake
Which organism gets the most energy?
a. snake
b. mouse
c. grass
d. fox
c. grass
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 color of light is the WORST for shining on plants so they can do photosynthesis?
GREEN! Because plants reflect green light, that's why we see them as green. If they reflect green, they are not using that light as energy.
Bob wants to determine at what ramp height will a cart roll the fastest. What would be his independent variable?
a. speed of the cart
b. ramp length
c. ramp height
d. none of the above
c. ramp height
What is the process of photosynthesis?
(HINT: THERE'S 3)
Carbon dioxide, water, and sunlight
x 2
grass.....bird.....snake.....hawk
Which is the secondary consumer? Hint:Who just eat the grass and bird
snake
What is the charge of a neutron?
neutral=no charge