Q: Q: Melting ice and grinding wood into sawdust are examples of what? Read this paragraph and choose the correct option from the provided answers: Melting ice and grinding wood into sawdust are examples of physical changes. Choices: - chemical changes - reversible changes - unpredictable changes - physical changes A:
A: physical changes

Q: Q: What do extensive properties depend on the amount of? Read this paragraph and choose the correct option from the provided answers: Normally, electric charge is transferred when electrons leave the outer orbits of the atoms of one body (leaving it positively charged) and move to the surface of another body (causing the new surface to gain a negative net charge). In a plasma all electrons are stripped from the atoms, leaving positively charged ions and free electrons. Choices: - experimental controls - sample temperature - independent variables - matter in a sample A:
A: matter in a sample

Q: Q: What is the main problem in both types of diabetes? Read this paragraph and choose the correct option from the provided answers: Diabetes is a disease in which insulin fails to keep blood glucose levels within a healthy range. In type 1 diabetes, the pancreas doesn't produce insulin. In type 2 diabetes, body cells do not respond normally to insulin. Choices: - metabolism - blood concentration - blood pressure - insulin production A:
A: insulin production

Q: Q: The marsupial embryo is nourished inside the uterus with food from a yolk sac instead of through a what? Read this paragraph and choose the correct option from the provided answers: The marsupial embryo is nourished inside the uterus with food from a yolk sac instead of through a placenta. The yolk sac stores enough food for the short period of time the embryo remains in the uterus. After the embryo is born, it moves into the mother's pouch, where it clings to a nipple. It remains inside the pouch for several months while it continues to grow and develop. Even after the offspring is big enough to leave the pouch, it may often return to the pouch for warmth and nourishment. Eventually, the offspring is mature enough to remain outside the pouch on its own. Choices: - stomach - ovum - umbilical cord - placenta A:
A: placenta