You are presented with the quiz "What does gravity's pull determine about an object?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "gravity causes objects that have mass to be pulled down on a planet" and "weight is the product of an object's mass and the acceleration due to gravity". So, what's the best answer to the question?

OPTIONS:
- speed
- Joules
- Energy.
- Weight
- size
- density
- toughness
- energy

Answer: Weight

You are presented with the quiz "What causes the removal of rock particles?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "wind causes erosion" and "erosion is the physical removal of rock particles". So, what's the best answer to the question?

OPTIONS:
- Warm air
- Sunlight
- heat
- stream
- rain
- Wind
- Time
- rivers

Answer: Wind

You are presented with the quiz "Some strange life forms have an envelope of what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some viruses have an envelope of phospholipids and proteins" and "viruses are strange life forms". So, what's the best answer to the question?

OPTIONS:
- Chemical energy
- biological diversity
- Something coming from a gland
- layers of fat
- characteristics
- phospholipids and proteins
- Positive charges
- visible energy

Answer: phospholipids and proteins

You are presented with the quiz "What are metals good at?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if heat is conducted to an object then that object will become hot" and "metals conduct heat well". So, what's the best answer to the question?

OPTIONS:
- to move people
- power
- cooling
- voltage
- polarizing
- electricity
- conducting
- magnetizing

Answer:
conducting