You are presented with the question "What are formed by flowing rivers through erosion over long periods of time?" and the following answer choices: - deserts - a hydraulic system - deep valleys - pyramids - Calcium carbonate - patch reefs - buildings - Sediment Now knowing that most canyons are formed by flowing rivers through erosion over long periods of time and deep canyons and valleys are carved out, choose the best answer.
deep valleys
You are presented with the question "What kind of animals has a water vascular system with tubed feet?" and the following answer choices: - animals - starfish - reeds - insects - warm-blooded - sponges - sea coral - four limbs Now knowing that echinoderms have a unique water vascular system with tube feet and echinoderms are represented by the starfish, choose the best answer.
starfish
Q: You are presented with the question "Roundworms reproduce by combining an egg and sperm to form what?" and the following answer choices: - larvae - plants - offspring - Flowers - seeds - infants - kittens - puppies Now knowing that roundworms reproduce sexually and sexual reproduction is the combination of egg and sperm to form larvae, choose the best answer.
A: larvae
Question: You are presented with the question "what can change population size through movement?" and the following answer choices: - cows - ducks - goats - animals - relocation - mammals - fur seals - insects Now knowing that migration is a type of movement that changes population size and insects can also migrate, choose the best answer.
Answer: insects
*Question*
You are presented with the question "When do moose begin behavior intended to attract a mate?" and the following answer choices: - Winter - howling - The past - sweating - Summer - autumn - ligt - movement Now knowing that courtship is behavior that is intended to attract a mate and moose courtship begins in autumn, choose the best answer.
**Answer**
autumn
Q: You are presented with the question "What is used to determine the age of fossils?" and the following answer choices: - Calcium carbonate - dinosaurs - a barometer - electron microscope - a thermometer - a decay curve - chemical equations - Physical weathering Now knowing that radioactive dating is used to determine the age of fossils and radioactive dating requires the use of a decay curve, choose the best answer.
A: a decay curve