Q: Claw ends of hammers and flagpole pulleys are examples of simple machines that reverse what? Choices: - direction of power - direction of work - direction of friction - direction of force A:
direction of force

Q: What device is a magnetic disc that provides long-term storage for programs and data? Choices: - software - cassette - floppy drive - hard drive A:
hard drive

Q: Q: What is the unsorted pile of material dropped by glaciers called? Choices: - icy deposit - glacial runoff - landfill - glacial till A:
A: glacial till

Question: Q: Which hormones work together to control the level of glucose in the blood? Choices: - insulin and estrogen - serotonin and glucagon - testosterone and insulin - insulin and glucagon A:
Answer: insulin and glucagon

*Question*
Q: Where part of the atmosphere is the uppermost mantle? Choices: - troposphere - thermosphere - isosphere - lithosphere A:
**Answer**
lithosphere

(Q).
Q: During a what type of reaction do chemical changes take place? Choices: - toxic - biological - nuclear - chemical A:
(A).
chemical