Ques: Q: Atoms of different elements can combine in simple whole number ratios to form what? Choices: - mixtures - carbon compounds - combinations - chemical compounds A:
Ans: chemical compounds

Ques: Q: What is the name of a joint in which one bone rotates in relation to another bone? Choices: - gliding - hinge - ball and socket - pivot joint A:
Ans: pivot joint

Ques: Q: The two stages of photosynthesis are the light reactions and what? Choices: - digestive cycle - respiratory cycle - reproductive cycle - calvin cycle A:
Ans: calvin cycle

Ques: Q: Not even light can escape from what extremely dense object sometimes found in deep space? Choices: - large holes - light holes - star holes - black holes A:
Ans:
black holes