Which of the following is a chemical reaction?

1. Freezing liquid Mercury

2. Filling a balloon with air

3. Cutting a piece of paper into two pieces

4. Dropping a sliced orange into a vat of Sodium Dydroxide

A food that is labeled as being "fat free" is best described as containing:

What type of device can be used to view the movement of living microorganisms A. light microscope B. Electric electron microscope C. Transmission electric microscope D. Telescope

Why is it important to distinguish between observations and inferences?

Ethyl alcohol fermentation breaks down glucose into what two products?

which of the following contains multiple gymnosperm ovules? a. ovulate coneb. integumentc. megasporangiumd. megaspore

Why is salt so precious in the rain forest?

A human activity that could significantly decrease the amount of carbon dioxide in the air is (1) increasing the use of fossil fuel (2) controlling insect pests that eat stored grain (3) burning garbage and trash to generate electricity (4)

What are somatic cells

What type of bacteria causes environmental change

Contrast a food chain with a food web, and include the total % of energy which is conserved between each level of a food chain