Which of these is an example of a chemical change?

A. Burning a piece of wood

B. Breaking a tree branch

C. Dissolving salt in water

D. Melting Water

Some islands are formed by volcanic eruptions, and the islands provide habitats for many organisms. What is another way volcanic eruptions can benefit an ecosystem? A. transporting seeds B. providing fertile soil C.

Approximately how far apart were north america and europe 200,000 years ago

Why do these pea plants get 2 alleles for pea color?

A company in San Francisco uses petroleum products to make plastics. Arrange the sentences in the correct order to show how the company could be contributing to climate change.

When was the devonian period?

What characteristic of Charales would enable them to survive a dry spell? sperm with flagella phragmoplasts sporopollenin chlorophyll a

Many Head Start programs have a community aide who A. tutors at-risk children in the home. B. gives families the money they need to survive. C. connects families to community resources they need. D. represents families at family/teacher conferences.

Stranded on an island, you have two sources of water to drink: salty ocean water and contaminated fresh water. explain your choice of drinking water and indicate why your selection is the best choice.

How are a hypothesis a prediction and an experiment related

Two species of garter snakes live in the same geographic area. One lives mainly in water and the other mainly on land; therefore, they rarely encounter each other and do not interbreed. What type of isolation is this?