The Earth being tilted on its rotating axis causes seasons, and seasons are caused by the tilt of the axis relative to the planet's orbit. Given these facts, what causes a planet's seasons among the following options: - motion  - clouds  - cold  - climate  - temperature  - orbit  - gravity  - wind
orbit

Heavy rains cause flooding, and hurricane rains can cause landslides and flash floods. Given these facts, what is caused by flooding among the following options: - landslides  - desert  - sunlight  - drought  - Water expanding  - erosion  - contamination  - Pollution
landslides

Q: Plants use unsaturated fatty acids to store energy, and energy is measured in Joules. Given these facts, what measurement is used for something plants use unsaturated fatty acids to store among the following options: - amperes  - heat  - volts  - seconds  - vitamin C  - electron  - glucose  - joules
A: joules

Question: Erosion causes a river to become deeper and wider, and clearing of land can lead to erosion of soil into the river. Given these facts, what makes a river wider among the following options: - rainfall  - salinity  - arteries  - flow of electrons  - Water expanding  - Physical weathering  - a hydraulic system  - clearing land
Answer: clearing land

*Question*
Some flowers become fruits, and fruits Fruits and fruit juices provide important amounts of vitamin C and potassium. Given these facts, some flowers provide among the following options: - seeds  - vitamin C  - Pollen grains  - growth  - pollen  - Reproduction  - traits  - warmth
**Answer**
vitamin C

*Question*
Mammals generate heat mainly by keeping their metabolic rate high, and birds have a high metabolic rate and a high energy requirement. Given these facts, what mammals have a high energy requirement and generate heat among the following options: - cats  - bats  - Crustaceans  - bears  - frogs  - lizards  - birds  - mammals
**Answer**

birds