1
This system:
Protects, shapes, and helps movement
Skeletal
What energy transformation takes place in a lightbulb?
Heat into light
Light into heat
Light into electrical
Electrical into light
Electrical into light
During which phase of the water cycle do clouds form?
Condensation
The tops of some moutains are sharp and pointed, while the tops of others are smooth and rounded. This difference is caused by....
Rivers flooding
Erosion and weathering
Earthquakes and waves
Rocks melted by lava
Erosion and weathering
Which is a way to improve air quality?
Driving large cars
Building more factories
Burning wood in the fireplace
Using solar energy to produce electricity
Using solar energy to produce electricity
This system:
Shapes and moves the body
Muscular
When light hits a mirror, most of the light is....
Reflected
Ann places a piece of wet cloth in sunlight. After some time, she notices that the piece of cloth has become dry.
Which process explains how the piece of cloth became dry?
Evaporation
A scientist discovered a way to turn plant material into fuel. This more cleanly burning fuel can be used in cars instead of gas. How do people benefit from turning plant material into fuel?
Cars are safer
Farmers grow more
Air pollution is reduced
Number of cars increases
Air pollution is reduced
Windmills are used to obtain useable energy from wind. Which would be an advantage of using a windmill?
Windmills are expensive
Wind does not always blow
Pollution is not created
Populations of birds can be reduced
Pollution is not created by windmills
This system:
Breaks down food and sorts through the nutrients.
Digestive
Vibrations in the air caused by hitting a drum form...
Sound
During evaporation, liquid water is converted into a gas. What is that gas called?
Water Vapor
Over the past decade (10 years), the carbon dioxide levels in the atmosphere has been increasing dramatically. The levels of carbon dioxide has made the temperatures of the world increase dramatically also. What are scientists calling this?
Many people throw away almost 5 pounds of trash each day. How could everyone decrease the amount of trash thrown away daily?
Recycle
Use more
Put trash into landfills
Pick up trash from the ground
RECYCLE