5th - Science Unit 3 Lesson 4 notes revised

Question 0

What originates at power plants and flows through wires to houses and business?

Answer 0

Electrical energy

Question 1

Electrical energy can be transformed into what?

Answer 1

Thermal, light, or mechanical energy

Question 2

Electricity will only flow through an unbroken path of conductors are called what?

Answer 2

Circuit

Question 3

Light energy travels how?

Answer 3

As a wave but also as a particle

Question 4

What forms when light hits an object that it cannot pass through?

Answer 4

Opaque

Question 5

The size of a shadow is affected by the ____________ and ______________ between the light source and the object.

Answer 5

Angle and distance

Question 6

What is light energy from the Sun that reaches Earth’s surface called?

Answer 6

Solar radiation

Question 7

Solar radiation is used by plants to carry out what?

Answer 7

Energy

Question 8

What influences weather and climate and drives the water cycle?

Answer 8

Solar radiation

Question 9

Electrical energy can be charged, or ______________, into light, heat or mechanical energy.

Answer 9

Transformed

Question 10

What is the type of energy that comes from the movement of charged particles called?

Answer 10

Electrical energy

Question 11

What do warmer substances have more of then cooler substances?

Answer 11

Thermal energy

Question 12

What do moving objects have that is equal to the sum of their kinetic and potential energy?

Answer 12

Mechanical energy

Question 13

Circuits must have an unbroken path of conductors and ____________ that causes the electrons to move along the path.

Answer 13

Voltage source

Question 14

A complete circuit allows electric ___________ to flow.

Answer 14

Current

Question 15

What is an object that transforms electrical energy to light or heat as it slows electrons in an electrical circuit, such as a lightbulb?

Answer 15

Resistor

Question 16

The amount of ____________________ moving through a circuit is measured in units called __________.

Answer 16

Electric charge, amperes (A) or amps

Question 17

Light is vibrating what?

Answer 17

Electrical and magnetic energy

Question 18

Light waves vibrate in directions _______________ to the direction of their motion.

Answer 18

Perpendicular

Question 19

What two types of properties does light have?

Answer 19

Particles and light waves

Question 20

What do objects that do not allow light to pass through cause?

Answer 20

Shadow

Question 21

What does the size of the shadow depend on?

Answer 21

The angle and the distance between the light source and an object.

Question 22

What do plants use to carry out photosynthesis?

Answer 22

Solar radiation

Question 23

Explain how electrical energy can be used to provide heat and light for a room. What energy transformations occur? Where does the electricity come from?

Answer 23

The electrical energy is sent through wires and cables to homes and businesses. Electrical energy can be converted to light and heat energy. Inside the lightbulb is a filament which resists electric current that heats and glows. Electrical devices change this energy into other kinds of energy such as thermal, light and mechanical. Most of electrical energy comes from power plants that burn fuel to make electricity.

Question 24

What part of the flashlight is the resistor?

Answer 24

Lightbulb

Question 25

Which part of the flashlight make up the circuit?

Answer 25

Conductors, switch, voltage source, and resistor

Question 26

Which part of the flashlight can open or close the circuit?

Answer 26

Switch

Question 27

Explain how the weightlifter transforms chemical energy into mechanical energy.

Answer 27

When he eats food, chemical energy passes to him. When you move, his muscles change the chemical energy from the food you ate into mechanical energy.

Question 28

What is the source of light energy in the photo with the trees?

Answer 28

The sun

Question 29

Besides light energy, what else is the electrical energy of the lightbulb being changed into?

Answer 29

Thermal energy