5th - Science Unit 3 L4&5

Question 0

What does a voltage source do

Answer 0

Increases the strength of electrons moving in the circuit

Question 1

Why is the light bulb the resistor

Answer 1

a resistor is an object in an electric circuit that resists the flow of electrons. it changes energy into heat or light

Question 2

Would fossil fuels come from

Answer 2

Under the ground

Question 3

What is used to determine the age of a fossil

Answer 3

To find the half-life of the element

Question 4

What uses wind to generate electricity

Answer 4

Windmill

Question 5

What happens to electrons while moving through a resistor

Answer 5

Electrons lose energy when moving through a resistor

Question 6

What do sedimentary rocks found in fossils tell us

Answer 6

They tell us about lifelong long ago

Question 7

where does most of the earth energy come from

Answer 7

Sun

Question 8

Where does geothermal energy come from

Answer 8

Inside the earth….it produces geysers and Hot Springs

Question 9

What are some examples of alternate energy sources

Answer 9

Geothermal energy, nuclear, solar, moving water, wind

Question 10

list the parts that make up a circuit

Answer 10

Voltage source, resistor, switch

Question 11

where the oldest fossils found

Answer 11

Deepest rock layer

Question 12

List three ways to conserve nonrenewable resources

Answer 12

Turn off lights
carpool to save gas
turn off hot water when not using it

Question 13

Explain how coal is made

Answer 13

Dead organisms collect in a swamp
Turns to peat
Press turns into coal

Question 14

Explain how oil and natural gas are formed

Answer 14

Dead organisms collect on the ocean floor
they’re buried in sediment
then pressure forms oil and gas

Question 15

Mechanical energy

Answer 15

The sum of potential and kinetic energy

Any moving object like electrical motors change electrical energy into mechanical energy

Question 16

Electrical energy

Answer 16

Transformed into thermal, light or mechanical energy

Batteries and power plants

Question 17

Thermal energy

Answer 17

Energy due to the motion of particles in matter

Ice cubes furnace and hairdryer

Question 18

Relative age

Answer 18

Age from one rock or fossil compared to another

Question 19

Absolute age

Answer 19

Rocks age in years

Question 20

Fossils

Answer 20

Remains or imprints of living things from the past

Question 21

Fossil fuel

Answer 21

form from the decay of ancient forms of life

Question 22

Era

Answer 22

Long stretches of time used to measure earth geological history

Question 23

Circuit

Answer 23

A loop formed when current passes through unbroken path

Question 24

Light

Answer 24

A wave made from electric and magnetic energy