Grade 8 Science

Does anyone know the correct answer to this Science question?

If you do work on an object, how will its energy change?

Its energy will increase.

Its energy will decrease.

Its energy remains the same.

Whitch is a type of mining where steam beds are minded

What would be the formula of the precipitate that forms when pb (no3) 2 (aq) and k2so4 (aq) are mixed?

What element has its 7 valence electrons in energy level 4 in s and p orbitals?

What are devices that move atomic nuclei and extremely high speeds

Why does bromine not react with sulphur?

What are some special effects you can make with dry ice?

Choose the statement that best completes the sentence. Whether a substance is a gas, liquid, or solid is dependent on the natural attractive forces between molecules and how the molecules collide with the container.

Formula for hydroselenic acid

The branch of chemistry that is the study of the composition, properties, and reactions of matter is called

According to the article, HOW has the discovery of the Mimivirus influenced scientists' ideas about viruses? А Since it acts differently than other viruses, scientists think it could lead to a vaccine for cancer B.