Earth Science
Which is correct?
A. The Sun completes one revolution around the Earth a year.
B. The Earth completes one revolution around the Sun a year.
C. Both
B. The Earth completes one revolution around the Sun a year.
What is an ecosystem?
An ecosystem is a community of living and nonliving things in an area.
What are the three states of matter?
Solid, liquid, and gas
How long does it take for the Earth to rotate?
24 hours/1 day
What ecosystems have we created? Describe both.
A terrarium and an aquarium.
A terrarium is an enclosed, clear habitat for land animals and plants.
An aquarium is an enclosed habitat for aquatic animals and aquatic plants.
A mixture is a combination of substances.
A mixture is a combination of substances. (Trail mix)
What causes all things to fall to the ground?
Gravity
What is the process called in which plants make their own food?
Photosynthesis
What is a solution? Give an example.
One substance dissolves into another. (Koolaid)
What causes shadows? What causes their size?
When are they longest? When are they not visible?
The Sun causes shadow. The angle and distance causes the size.
They are longest in the early morning and late afternoon. They are not visible at noon.
What is the difference between producers and consumers? Give an example of both.
Producers make their own food. Consumers eat other living things.
What is a physical change in a state of matter? Give an example.
Physical changes; melting, freezing, boiling, evaporating, and condensing
What causes the seasons?
The seasons change because Earth’s axis is tilted in one direction in space as it orbits the sun. When a hemisphere is tilted toward the sun, it has summer, and when a hemisphere is tilted away from the sun, it has winter.
Give an example of a food web.
Must include: Producers, Consumers, and Decomposers
What is a chemical change in a state of matter? Give an example.
When a substance completely changes/Produces a new substance (cooking an egg)