Mike is measuring sound waves as they travel through different materials. Which of the following will Mike find to be true about sound waves? 1. They travel the fastest through solids.
2. They travel the fastest through gases.
3. They travel more slowly in solids than in liquids.
4. They will speed up as they travel from a solid to the air.

Which units ate used to measure both velocity and speed? check all that apply

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

If a checkpoint detects damaged dna, the checkpoint may