Question

please send me answers fast​

Answer 1

Q1A Answers:

1 chloroplast

2 voluntarily

3 Metalloids

4 hard

Q1B Answers:

1 fuel

2 Higher than 20,000Hz

3 Magnetic needle

4 Soap Nut

Q2A Answers:

1 Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas are examples of fossil fuels.

2 Fluoride toothpaste is very effective in preventing tooth decay. The amount of fluoride in toothpaste is usually enough to reduce decay. In areas where the water supply has fluoride added, fluoride toothpaste gives extra protection.

3 A reversible change is a change that can be undone or reversed. If you can get back the substances you started the reaction with, that's a reversible reaction. Examples of reversible reactions include dissolving, evaporation, melting and freezing.

4 hertz

Frequency is measured in hertz (Hz). For sound, this means the number of pressure waves per second that would move past a fixed point.

Q2B Answers:

1 true

2wrong

3 right