Changes in Matter
Ecosystems
Human Impacts
Star Patterns
Earth's Water
100

Photosynthesis in plants uses energy from this source.

What is the sun or sunlight?

100

This biome is found in tropical regions, with temperatures ranging between 66° F - 77° F. It is knowns for its large trees, diverse animals, and lots of rainfall.

What is a rainforest?

100

These energy sources, like lil and coal, take millions of years to form, and once they are gone, they can't be replaced quickly.

What are nonrenewable resources?

100

This group of stars in the sky resembles a spoon and people use it to find the North Star.

What is the Big Dipper?

100

This natural phenomenon happens when clouds get too heavy with water. It is a significant step in the water cycle. 

What is rain or precipitation?

200

This process turns liquids into solids, but the substance stays then same.

What is freezing?

200

In a food web, this explains organisms that break fown nonliving or decaying matter, giving matter back into the ecosystem.

What are decomposers?

200

This is energy that comes from the movement of water.

What is hydroelectric energy?

200

This spinning motion of our planet causwes day and night to happen and takes 24 hours to complete.

What is the Earth's rotation?

200

This water is found under the Earth's surface. People drink and use this water a lot.

What is ground water?

300

When a popsicle melts in the sun, it becomes a liquid, but the substance stays the same. This is an example of...

What is a physical change?

300

This nonliving factor in an ecosystem is essential for photosynthesis. It affects the growth and survival of plants by its intensity and duration.

What is the sun or sunlight?

300

This gas is released by burning fossil fuels, contributing to climate change. Humans also breath this gas out.

What is carbon dioxide?

300

These ancient tools were placed on the ground ad used shadows from the sun to help tell time.

What is a sun dial?

300

This large body of saltwater covers about 71% of Earth's surface.

What is the ocean?

400

This kind of change occurs when you bake a cake and a new substance is formed.

What is a chemical change?

400

This term refers to the trapping of heat in the earth's atmosphere, caused by gases like carbon dioxide and methane.

What is the greenhouse effect?

400

These are materials or substances such as minierals, forests, water, and fertile land, that occur in nature and can be used for economic gain.

What are natural resources?

400
The Earth's tilt combined with this circular path of our planet causes the changing of Earth's seasons.

What is Earth's rotation?

400

This is the warmest ocean on Earth. There are 35 countries that are on its coast including France, India, Thailand, Singapore, Pakistan and Malaysia. 

What s the Indian Ocean?