Science 1
What is an ecosystem?
Living and nonliving things interacting.
What do decomposers do?
Break down dead organisms.
What causes day and night on Earth?
Earth rotating on its axis.
Describe how energy moves through a food chain.
Energy moves through a food chain when the Sun gives energy to plants, plants are eaten by animals, and those animals may be eaten by other animals.
What are two nonliving parts of an ecosystem?
Two nonliving parts of an ecosystem are water, sunlight, air, rocks, or soil. (Any two)
What do plants use to make their own food?
Sunlight.
Which state of matter has a definite shape and volume?
Solid.
What is the force that pulls objects toward Earth?
Gravity.
Why are plants important to ecosystems?
Plants are important because they make their own food, provide oxygen, and are the base of most food chains.
On the nanoscale, how are solids and liquids different?
.In a solid, molecules are close together whereas liquids molecules are more spread apart. Solids and liquids are different because solids keep their shape, while liquids take the shape of their container.
What is the main source of energy for Earth?
The Sun.
What happens when matter is heated?
It usually expands.
What is weather? *Hint: Think about where weather is created...
Daily conditions of the atmosphere.
What is one example of a physical change? *Hint: Think about the water cycle...
A physical change is when something changes form but not what it is, like ice melting into water.
What happens to water when it freezes?
When water freezes, it turns from a liquid into a solid (ice).
What gas do plants take in from the air?
Carbon Dioxide.
What type of energy is stored energy?
Potential energy.
What tool is used to measure temperature?
Thermometer.
What is one example of a chemical change?
A chemical change is when a new substance is made, like baking a cake or rust forming on metal.
Why is gravity important on Earth?
Gravity is important because it keeps us and everything else on Earth from floating away.
What is a producer in a food chain?
A plant that makes its own food.
What type of energy is energy of motion?
Kinetic energy.
What is erosion? *Hint: Think about how wind had an effect on rock over time...
Movement of soil and rock.
How does the Sun affect weather on Earth?
The Sun affects weather by heating Earth’s surface, which causes wind, clouds, and weather patterns.
What is one way humans can protect ecosystems?
One way humans can protect ecosystems is by recycling, reducing pollution, or protecting animals and habitats.