Fact 1: If an object in a fluid is more dense than that fluid then that object will sink in that fluid because of gravity. Fact 2: Waves can be created at the boundary between fluids of different densities. Given the two facts above, answer the question "objects will sink between boundaries with different what due to gravity" with the following options: - Energy. - surfaces - densities - forces - rocks - minerals - energy - heat energy
densities

Fact 1: Plant reproduction requires pollination. Fact 2: Perennial types are planted outside in spring. Given the two facts above, answer the question "what reproduction requires pollination?" with the following options: - humans - They lay eggs - Tropical - bees - insects - subtropical - perennials - heterotrophs
perennials

Q: Fact 1: Arthropods are the largest phylum of invertebrates. Fact 2: Insects are in the phylum Arthropoda. Given the two facts above, answer the question "What group do insects belong to?" with the following options: - graptolites - animals - annelida - mollusca - chordata - honeybees - arthropods - more abundant
A: arthropods

Question: Fact 1: Fertilization occurs when a sperm and an egg fuse. Fact 2: Sperm and eggs are cells known as gametes. Given the two facts above, answer the question "What causes fertilization?" with the following options: - pollen - infertility - gametes - orchids - seeds - no physical contact - honeybees - isolation
Answer: gametes

*Question*
Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Water is everywhere H20. Given the two facts above, answer the question "What causes H20 to expand when frozen?" with the following options: - evaporation - vaporization - hydrogen bonds - helium bonds - mysterious forces - nitrogen bonds - Physical weathering - precipitation
**Answer**
hydrogen bonds

Q: Fact 1: Electrical current running through a wire causes that wire to heat up. Fact 2: Electricity is a kinetic energy. Given the two facts above, answer the question "_ running through a wire causes that wire to heat up" with the following options: - sunlight - hydrogen and oxygen - activation energy - to move people - an object - rays or beams - kinetic energy - reflecting light
A: kinetic energy