The color of leaves on deciduous trees usually changes in the autumn season, and common deciduous trees are the oak, elm and beech. Given these facts, which tree's leaves change color in autumn among the following options: - Fir - wind - Palm - blue - elms - Oak - Ficus - Aves
Oak

Harming an animal species has a negative impact on the population size of that species, and pollution is usually harmful to one or more species of animal or plant. Given these facts, what is usually harmful to the population size of a species among the following options: - Pollution - reproduction - viruses - disease - habitat - ecosystems - influenza - deforestation
Pollution

Q: Temperature changing can cause phase changes, and when water goes through the cold induced phase change to produce ice, the ice expands. Given these facts, temperature changing can cause what to change to ice among the following options: - glass - basalt - skin - heat - diamond - water - Joules - sweat
A: water

Question: Earth 's tilt on its rotating axis causes seasons to change, and weather changes rapidly in all seasons. Given these facts, earth's tilt on it's rotating axis causes rapid what among the following options: - temperature - root growth - population movement - rainfall - cloud density - weather changes - moon phases - crust pressure
Answer: weather changes

*Question*
Fossils are formed when layers of sediment cover the remains of organisms over time, and all streams carry sediment . Given these facts, what carries something that covers organisms to make fossils among the following options: - squids - Streams - streams. - coral reef - coral - amoebae - bamboo - Nematoda
**Answer**
Streams

*Question*
Fertilization occurs when a sperm and an egg fuse to form a diploid zygote, and if a human ovum is fertilized, a zygote is formed. Given these facts, what forms a zygote among the following options: - amoeba - ovum - Fe - seeds - fungi - wheat - nektar - pollen
**Answer**
ovum