Earth Science
How much of the earth's surface is covered with water?
a. 1/4 b. 2/4
c. 3/4 d. 3/8
c. 3/4
Salt water dissolves quicker in cold water by ...
Either stirring the solution or heating it up.
What is it called when a solid turns into a gaseous sate?
Melting
What is the pigment in plants that is necessary for photosynthesis?
Chlorophyll
What is the smallest planet in our solar system?
Mercury - only slightly larger than Earth's moon
Which of Earth's spheres would you find icebergs?
Hydrosphere - ice is the solid state of water
What are the 3 ways heat is transferred?
Conduction (direct contact), convection (heat transfer through a fluid) and radiation
What is it called when a liquid turns to a solid-state?
Freezing
What trophic level would a tertiary consumer be found at?
4th trophic level
Which planet is the closest planet to Earth?
Venus - Mars is 319.66 million km while Venus is 249.81 million km away.
Which layer of the atmosphere is closest to the earth?
Troposphere - 7 to 15 km above the Earth's surface
What is the chemical formula for Ammonium Sulfate?
Ammonium: SO42-
Sulfate: NH4+
(NH4)2SO4
What occurs at the boiling point of a substance?
Evaporation
Which of the following animals changes its fur color during the winter to help protect it in its surroundings?
a rabbit
b. arctic fox
c. polar bear
d. reindeer
b. Arctic fox
NASA's Artemis program aims to land humans on _____.
Moon - Its goal is to land the first female astronaut and next male astronaut on the Moon's South Pole by 2024.
The environmental protection agency wanted to start using an alternative fuel to cut down on pollution. Which fuel would they choose?
a. ethanol
b. fossil fuels
c. crude oil
d. coal
but natural gas also burns very cleanly
What is a positron?
It's a subatomic particle with the same mass as an electron and a numerically equal but positive charge. They can be created by a positron emission from radioactive decay.
What is it called when a solid changes into a gaseous state?
Sublimation
A jelly fish is known to clone itself. It does this by growing buds on its tentacles. What type of reproduction is this
Asexual reproduction - doesn't need a mate to reproduce
If the Earth revolves around the sun for 4 yrs, how many times does the moon revolve around the Earth?
48 times
4yrs x 12 times/year
Explain why the Sun always rises in the East and sets in the West.
Earth rotates or spins toward the east, and that's why the Sun, Moon, planets, and stars all rise in the east and make their way westward across the sky.
Write/say the balanced chemical equation for the complete combustion of hydrocarbons.
CH4 + 2O2 --> CO2 + 2H2O + energy
- occurs when there is enough oxygen to form water & energy
What is it called when a gas changes to a solid state?
Deposition
What would happen if the top predators in a food chain were displaced? Explain.
The population of secondary trophic level animals would increase dramatically.
Would lead to a shortage in primary producers which would lead to intraspecific and interspecific competition.
Over time, some would die and the other animals would leave or die as well.
When are shadows the shortest?
At noon since this is the time when the Sun reaches its highest point.