7.9A, 7.9B, 7.9C 7th Grade Science Review

Front

What are the three main factors that allow life to exist on Earth?

Back

Proximity of the Sun, presence of water, and composition of the atmosphere.

Front

What is the main source of energy for life on Earth?

Back

The sun.

Front

What shape is Earth's orbit around the Sun?

Back

Elliptical (flattened circle).

Front

Where are most asteroids located in our solar system?

Back

Between the orbits of Mars and Jupiter.

Front

What do we call a space rock that survives its fiery passage through the Earth's atmosphere and strikes the Earth's surface?

Back

Meteorite.

Front

What is a meteoroid?

Back

A small rocky or metallic body in outer space.

Front

What is a meteor?

Back

A meteoroid that burns up upon entering Earth's atmosphere, creating a bright streak of light.

Front

What is the difference between a comet and an asteroid?

Back

Comets are icy bodies that release gas or dust; asteroids are rocky bodies.

Front

What is the role of the atmosphere in supporting life on Earth?

Back

It provides essential gases like oxygen and protects from harmful solar radiation.

Front

How does the Sun affect life on Earth?

Back

It provides the energy necessary for photosynthesis and regulates climate.