Science Unit 3 Review

When the north end of Earth's axis is tilted toward the Sun, North America will experience...

• more DIRECT rays and SHORTER days

• more INDIRECT rays and SHORTER days

• more DIRECT rays and LONGER days

The phase of the Moon you see depends on_______.

• How much of the Moon's surface is lit by the sun.

• Where you are on Earth's surface.

• How much of the sunlit side of the Moon faces Earth.

Scientists think the Moon was formed when....

• a large object struck Earth, and the material ejected from the collision, combined.

• gravitational forces attracted a moon formed elsewhere is space.

• meteoroids collected and solidified within the pull of Earth's gravity.

The Moon appears to be cut in half during...

• first quarter and third quarter phase.

• new moon and first quarter phase

• new mood and full moon phase

Which event began the space race?

• The United States established NASA

• Yuri Gagarin went into space

• The Soviet Union launched Sputnik 1

The space race was between...

• The United States and China

• The United States and the Soviet Union

• The Soviet Union and China

Both reflecting and refracting telescopes are designed to...

• break visible light into colors of the spectrum

• separate visible light from ultraviolet and radio waves

• gather and focus visible light

Characteristics used to classify starts include...

• mass, color, and temperature

• size, distance, and brightness

• color, brightness, and distance

The Sun is what type of celestial object?

• moon

• star

• planet

The lifetime of a start depends on its....

• mass

• absolute brightness

• temperature