Q: Why do dogs have most of the characteristics of their parents?

OPTIONS:
- They inherit them from their parents.
- They live in the same habitats as their parents.
- They learn them by observing their parents.
- They eat the same foods as their parents.
A: They inherit them from their parents.
Q: What determines how long the Moon takes to complete one cycle of phases?

OPTIONS:
- the period of rotation of the Moon around its axis
- the period of revolution of the Moon around Earth
- the period of rotation of Earth around its axis
- the period of revolution of Earth around the Sun
A: the period of revolution of the Moon around Earth
Q: Sophie investigates the water supply at her school and the things that affect it. Which action is a direct observation?

OPTIONS:
- tasting water from a water fountain
- reading water test results
- studying the rules for purifying water
- investigating causes of water pollution
A: tasting water from a water fountain
Q: Sterling silver is a combination of silver and copper. Which of the following is also a combination of two or more metals?

OPTIONS:
- aluminum.
- lead.
- gold.
- brass.
A:
brass.