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

Why is the hypothesis that breaking a mirror cause seven years of bad luck not science? Why Is that the right answer? a. The results of studying the hypothesis are repeatable b. The results of studying the hypothesis are not biased c.

The medical term that means berry-shaped bacteria in twisted chains is:

How closely do Mendel insights into dominant and recessive traits match up with the ratios that punnett calculated in his Punnett squares?

How might physical weathering affect a sample

How do I write a CER paragraph? I need one for Science.

What is pie like math type pie

What causes the movement of calcium and sodium ions in and out of cardiac cells?

if research is restricted. then the new discoveries made are limited. which action is most likely to increase the number of discoveries scientist can make?

Which statement about nuclear fission is false? a: nuclear fission takes place in the core of the stars b: the fuel for nuclear fission is often uranium c: nuclear fission releases large amount of energy d: nuclear fission is used to generate

Some monkey flowers (Mimulus guttatus) living near the sites of copper mines can grow in soil containing high concentrations of copper, which is toxic to most plants. Copper tolerance is a heritable trait. Select the three statements that are true.