Ch-Ch-Ch-Changes
Which change in the state of matter requires heat to be removed?
a. Evaporation
b. Melting
c. Condensation
c. Condensation
What do producers get their energy from?
a. Eating other producers
b. Eating other consumers
c. Absorbing sunlight
c. Absorbing sunlight
What are hail, rain, and snow examples of?
a. Precipitation
b. Condensation
c. Transpiration
a. Precipitation
A student collects data about flies captured by a Venus flytrap each day at 9 a.m. What change might improve your data?
a. Collect data at 9 p.m. instead of 9 a.m.
b. Collect data at both 9 a.m. and 9 p.m.
c. Collect data only on sunny days at 9 a.m.
b. Collect data at both 9 a.m. and 9 p.m.
Why does Earth experience day and night?
a. The moon blocks light from the Sun
b. Earth rotates on its axis
c. Earth orbits the Sun
b. Earth rotates on its axis
If 10 g of baking soda and 20 g of vinegar create a new substance with a mass of 27 g, how much gas was produced in the reaction?
a. 1 g
b. 3 g
c. 6 g
b. 3 g
Which best returns nutrients to the soil?
a. Rain moving nutrients toward plants
b. Fungus and bacteria decomposing dead organisms
c. Bees pollinating flowers
b. Fungus and bacteria decomposing dead organisms
Which best represents the distribution of water on earth?
a. 75% fresh water, 25% salt water
b. 25% fresh water, 75% salt water
c. 3% fresh water, 97% salt water
c. 3% fresh water, 97% salt water
What tool would best be used to compare the sizes of butterfly wings?
a. Microscope
b. Scale
c. Ruler
c. Ruler
Why is the Sun the brightest star in the sky?
a. It is the biggest star in the universe
b. It is the hottest star in the universe
c. It is the closest star in the universe
c. It is the closest star in the universe
Which is NOT an example of a physical change?
a. Rusting metal
b. Burning wood
c. Boiling water
a. Rusting metal
What would happen if all producers were removed from a particular ecosystem?
a. The population of consumers would increase
b. Animals would either move away or perish
c. Other organisms would become producers
b. Animals would either move away or perish
What is required for evaporation to take place?
a. Heating frozen ice
b. Heating liquid water
c. Heating water vapor
b. Heating liquid water
Which would make the best use of test tubes and a microscope?
a. Collecting insects to compare feeding habits
b. Collecting pond water to find micro-organisms
c. Collecting leaves to examine their masses
b. Collecting pond water to find micro-organisms
Why do we have more hours of daylight in the summer than we do in the winter?
a. Earth is closer to the sun in the summer
b. The Earth's tilt causes us to get different amounts of sunlight
c. The Moon's orbit causes us to get more sunlight
If 10 g of salt is added to 50 g of four different liquids, what is the independent variable in this investigation?
a. Type of liquid
b. Amount of salt
c. Amount of liquid
a. Type of liquid
How do water lilies floating on water get the physical materials needed to make food?
a. From sunlight and water
b. From air and water
c. From insects and sunlight
b. From air and water
Which characteristic of the ocean influences various ecosystems?
a. The reflectivity of the water
b. The color of the water
c. The ocean currents in the water
c. The ocean currents in the water
Where would you most likely use an eyedropper?
a. In the sand of a desert
b. Inside fossils in a cave
c. In water in a forest
c. In water in a forest
What Earth cycle causes constellations to appear only during certain seasons?
a. Earth's rotation on its axis
b. Earth's revolution around the Sun
c. Earth's revolution around the Moon
What is NOT true about sugar being dissolved in water?
a. It is now a solution
b. This was a chemical change
c. The sugar and water can be separated
b. This was a chemical change
Why would a forest more likely be observed to have more organisms than a desert?
a. The forest gets more sunlight
b. The forest has less nutrients to share
c. The forest has more water available
c. The forest has more water available
Why is conserving natural resources important?
a. We have unlimited amounts of all fuels
b. Future generations will have what they need
c. We have already run out of our natural resources
b. Future generations will have what they need
What change to the slope of a ramp would cause a toy car's speed to increase going down the ramp?
a. Increase the slope
b. No change to the slope
c. Decrease the slope
a. Increase the slope
A shadow of a person is long and points west. Where is the Sun located in the sky?
a. Very low in the western sky
b. Almost directly overhead
c. Very low in the eastern sky
c. Very low in the eastern sky