Science Exam Flashcards
Identify products that come from forest resources.
Paper, medicine, nuts, and wood
What do you predict will happen if people use forest products faster than nature can replace the resources?
We will run out and it will become a nonrenewable resource.
In what ways do you use forest resources in your everyday lives?
I use paper when I write.
What is a mineral?
A mineral is a naturally occurring nonliving solid that in Earth’s crust
What is the main difference between a renewable resource and a non-renewable resource?
You can get renewable resources as fast as nature provides it, but nonrenewable resources take longer to access and pollute the Earth.
Why is carefully using renewable resources important?
It is important because if we were to run out of resources we would sadly DIE
Identify two energy sources that ancient people used.
Ancient people used burning wood and strong animals
Why do you think that coal, petroleum and natural gas are called fossil fuels?
These materials are made up of plants and animals’ fossils that died a
A long time ago and were compacted underground.
In what ways do you use non renewable resources in your everyday life?
WE use nonrenewable resources like natural gas and coal . We use coal when wee burn fire.
Name energy sources that can be transformed into electrical energy.
Wind ,hydroelectricity ,coal, solar.
Since geothermal energy (as well as solar energy and wind energy)is always available, why
Do you think we do not get ALL of our energy from these sources?
Because it takes time to drill through the rock, is expensive, and is in a hard location.
What kinds of energy do you use that ancient people also used?
We still burn wood and use the sun for energy
Why are wind and water energy usually converted to electricity before they are used?
Because they are easy to move through power lines.
What is the original source of most energy that people use?
solar
Which of Earth’s systems is made of rivers, lakes and oceans?
Hydrosphere
What is one positive effect of farming?
The aim of farming is to produce food for people
What is one negative effect of farming?
It replaces the types of organisms that normally live in an area
How do humans affect Earth’s natural resources?
We can pollute the resources
What is conservation?
Conservation is making the word and the environment better and safer
What are at least three ways you can reduce the amount of resources that you use in your daily life?
3 ways we reduce the resources that we use on our daily life is 1 you can turn off lights when you don’t need them 2 you can recycle instead of landfill because you produce more reusable stuff than trash 3 you can turn the water off in the middle of you brushing your teeth.
How do you recycle products at home.
I recycle paper at time because i produce a lot of paper that doesn’t need to go in the land fill
Define lightyear.
It is the distance light travels in a year 9 trillion 460 billion and 800 million km
How are temperature and brightness of a star related?
If the star is hotter its brighter if the star is not as hot its dimmer
What are two factors that affect how bright a star appears in the night sky?
ITs temperature and how far it is from the Earth.
Why are the sun and the Alpha Centauri star system brighter than the other stars visible from Earth?
they are closest to earth
Explain why Mars is considered the red planet
It is called the red planet because of its red color caused by its rusty iron.
What is the main difference between Earth and the other inner planets?
Earth supports life
How is the pull of the gravity similar to a tether ball attached to a pole by a string?
Because the string holds the ball on the pole like gravity does to earth. Earth is pulled to the sun and the moon. The moon helps it to almost perfectly balance
What are two differences between Earth and Mars?
Earth has living things on it it also has 1 moon and mars has 2 moons
What is Earth’s position in our solar system?
It is the third planet from the sun
Identify the four outer planets.
Jupiter, Saturn, Uranus, and Neptune
Why are the outer planets known as the gas giants?
They don’t have a solid core, instead they are mostly made up of gas.
How are the outer planets different from the inner planets?
The outer planets are different because they are bigger than the inner planets. They are made up of gas when the inner planets are made up of a more solid material.
What is the name of the feature that separates the inner planets from the outer planets?
the asteroid belt
How do you think a planet’s temperature is related to its distance from the sun?
If a planet is closer to the sun it is most likely hotter if a planet is farther away from the sun it is colder.
How did the planets get their names?
roman gods & goddesses
How is the outer layer of Earth different from the outer layer of Neptune?
Earth’s outer layer is crust and Neptune’s outer layer is gassy atmosphere
How is Jupiter’s rotation different from Earth’s rotation?
Jupiter’s rotation is twice as fast as Earth’s.
Why are the four outer planets also known as the gas giants?
Because they are mostly made of gas and they are big.
Sometimes a comet’s tail is visible, and sometimes it is not. Why is this?
The sun illuminates the trail of gas and dust which is why only some comments are visible to us
Sun
a huge ball of matter that gives off energy
Planet
;.large body of matter that travels around the sun
Moon
is a satellite made of rock and ice that orbits a planet.
Asteroid
are chunks of rock that measure in size from a meter to several kilometers in diameter
Comet
are chunks of ice and dust that have stretched out orbits around the sun
Orbit
curved path of an object around a star, moon, or a planet
