Chemistry
What would have to happen for an ice cube to turn into water, and then to water vapor?
There are 2 processes, name both of them
Melting
Evaporating
Both require heat
What is kinetic energy
Energy that an object in motion has
What is the difference between weather and climate?
Weather is daily, while climate is long term
Give an example of something that is a prokaryote and has prokaryotic cells
Bacteria
What are the 3 types of rocks?
Igneous
Metamorphic
Sedimentary
How could you separate out salt from water?
Boil the mixture until all of the water evaporates
What is electrical energy
Energy from the flow of electrons
In a convection current, one kind of air (rises/sinks) and the other kind of air (rises/sinks) creating a current. This creates zones of pressure that cause weather.
Hot air - rises
Cold air - sinks
How do plants get their "food"
They make sugar using the energy from sunlight, water, and carbon dioxide from the air
For a sedimentary rock to become an igneous rock, what would need to happen?
A sedimentary rock would have to break down, and then the pieces would need to be trapped beneath the Earth to be heated up, come out of a volcano, and then cool
Aluminum has a density of 2.7g/cm^3. Will it float or sink in water?
Sink, anything with a density above 1g/cm^3 will sink
Which has more potential energy, something 10ft off the ground or something 20ft off the ground AND Why?
20 ft off the ground because things that are up higher have more potential energy
What is it called when water vapor cools and turns back in to liquid water?
Condensation
Give an example of a producer and a consumer in an ecosystem
Producer - any plant
Consumer - anything that eats plants
- Fossils of the same plants are found on different continents and can be dated to the same time
- Continents moving away/ closer to each other
- Seafloor spreading
- The continents appear to fit together
Are the following things physical or chemical changes:
- salt dissolving in water
- melting ice
- burning paper
- cutting paper
- physical
- physical
- chemical
- physical
To increase the gravity between 2 things, what can you do - there are 2 options you need to list both
Increase the mass of the objects or decrease the distance between the objects
Where is most of the world's water located AND how much of the world's water is freshwater?
In oceans, and only about 3% is freshwater
What is an animal's niche?
Where they live and what they eat
What causes Earthquakes?
Two plats sliding against each other, and they get stuck. When they are finally released the build-up pressure causes an earthquake.
Which will be good conductors of heat and electricity, metals or nonmetals?
Give an example of an element that conducts electricity.
Metals,
Copper, Iron, Silver, Gold, Lead, Nickel, etc.
What kind of energy travels in waves?
Double points if you can identify what color has the longest wavelength
Electromagnetic (light) energy
Violet has the longest wavelength
What causes the seasons? There are TWO things you need to say
The Earth's revolution around the sun and the Earth's tilt
In a food web, eagles eat salmon. What would happen if the river where the salmon live got polluted?
- Would the number of salmon increase or decrease?
- Would the number of eagles increase or decrease?
Both salmon and eagles would decrease
What is the difference between renewable and non-renewable resources? Give an example of each
Renewable resources can be replenished - like trees
Non-renewable resources cannot be replenished - like metals that we use for electronics