Extra Lesson EASE 1 preparation_Grade 7

Extra Lesson

EASE 1 preparation

Grade 7

by Irvani Prasanti

​Balance : to measure mass

Spring ​Balance : to measure weight

Multiple Choice

As distance between two objects increase the pull of gravity 

• Increases

• Decreases

• Stays the same

Multiple Choice

The force of gravity acting on an object is the object's ______.

• mass

• matter

• weight 

• friction 

Multiple Choice

Which of the following never changes no matter where in the universe?

• weight

• force

• mass

• pounds

Multiple Choice

The amount of matter in an object is 

• pressure

• weight

• mass

• force

Multiple Choice

If the mass of an object on Earth is 18 grams, what would the mass of the same object be on the Moon?

• 18 g

• 4 g

• 0 g 

• 32 g 

Multiple Choice

A child has a mass of 30 Kg on Earth. If the gravity on Moon is one sixth that of the Earth what is the mass of the child on Moon? 

• 30 Kg

• 180 Kg

• 5 Kg

• 0 Kg

Multiple Choice

The force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter?

• 50 kg and 490 N

• 100 kg and 490 N

• 50 kg and 980 N

• 100 kg and 980 N

Multiple Choice

A cloud of gas and dust from which bodies in space are formed

• photosphere

• nebula

• solar flare

• Sunspot

Multiple Choice

The most abundant gases in a nebula are:

• Hydrogen & Oxygen

• Nitrogen & Oxygen

• Hydrogen & Helium

• Oxygen & Helium

Multiple Choice

A nebula starts to collapse because of:

• A nearby star shining it's light

• A passing spaceship

• A passing comet

• Gravity

Multiple Choice

How long ago did these nebular processes start?

• 4.6 years ago

• 4.6 light years ago

• 5.6 billion years ago

• 4.6 billion years ago

Multiple Choice

Our solar system began when...

• The Big Bang happened

• an ancient star exploded around 5 billion years ago

• every other solar system began

• a huge explosion occurred 15 billion years ago

Multiple Choice

What is the fuel for the sun's energy?

• The fusion of hydrogen atoms into helium

• The gravitational pull on the planets

• Solar wind

• The nebulae

Multiple Choice

What theory describes the formation of our solar system?

• The Big Bang theory

• The theory of general relativity

• The solar nebular theory

• The theory of evolution

​Tidal range is the height difference between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun and the rotation of Earth. Tidal range depends on time and location.

Multiple Choice

The bulge of water on the side of the Earth closest to the moon produces ___________.

• high tide

• low tide

• neap tide

• spring tide

Multiple Choice

Tides are the cycle of rising and falling ocean water that repeats automatically every

• 24 hours

• 12.5 hours

• 25 hours

• 6.25 hours

Multiple Choice

Tides are caused mainly by the differences in how much gravity from the moon and the sun pulls on different parts of the Earth. 

• True

• False

Multiple Choice

Changes in the positions of Earth, the moon, and the sun affect the height of high tides during a month. 

• True

• False

Multiple Choice

What type of tides would this arrangement of earth-moon-sun create?

• neap tide

• spring tide

• new moon tide

• full moon tide

Multiple Choice

Wha type of tide would this arrangement of earth-moon-sun create?

• full moon tide

• new moon tide

• neap tide

• spring tide

Multiple Choice

What causes tides?

• gravity

• wind

• spring

• neap

Multiple Choice

Why does the moon's gravitational pull have more of effect on tides than the sun's gravitational pull?

• they are the same

• the moon is larger than the sun

• tides are not caused by the moon

• the moon is closer to the Earth than the sun

Multiple Choice

High tides and low tides each happen _____ times per day.

• 4

• 2

• 1

• 24

Multiple Choice

Neap tides happen at _________ and _________ phases of the moon.

• first quarter and new moon

• last quarter and full moon

• waxing and waning

• 1st quarter and 3rd quarter

​Energy is CONSERVED.

​Energy before transformation is EQUAL to energy after transformation.

Multiple Choice

The Law of Conservation of Energy states:

• Energy can be created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only be transformed

• Energy can't be created, it can be destroyed and transformed

Multiple Choice

Kinetic Energy is the energy of _________

• thermal

• movement

• potential

• atoms

Multiple Choice

Which type of energy increases when you compress a spring?

• elastic potential energy

• kinetic energy

• radiant energy

• sound energy

Multiple Choice

What is potential energy?

• The energy an object has due to its position or condition.

• The energy an object has due to its motion.

• The energy an object has due to its chemical composition.

• The energy as object has due to its atomic structure.

Multiple Choice

What is energy?

• The ability to do work and cause change and move an object some distance.

• The push and pull exerted on an object.

• The relationship between matter and substances..

• The feeling you get after drinking a Monster or Red Bull

Multiple Choice

At what point does the roller coaster have the highest amount of potential energy?

• At the bottom of the first hill.

• At the top of the third hill.

• At the end of the ride.

• At the top of the first hill.

Multiple Choice

At what point of the ride have the highest kinetic energy?

• At the lowest point of the ride.

• At the highest point in the ride.

• On the middle hill of the ride.

• Roller coasters do not exhibit kinetic energy.

Multiple Choice

If the speed of an object increases, what also increases?

• potential energy

• solar energy

• static energy

• kinetic energy

Multiple Choice

What is chemical energy?

• A form of potential energy that is stored in chemical bonds between atoms.

• The potential energy an object has because of the movement of its molecules

• Kinetic and potential energy that is stored and produced by an electrical field.

• Energy sent out in the form of electromagnetic waves.

Multiple Choice

What is an example of Electric Energy

• Apple

• Rubber Bands

• Car Battery

• Table

Multiple Choice

Which 2 types of energy does the object in the image use?

• Electric and Thermal

• Nuclear and Elastic

• Chemical and Mechanical

• Sound and Elastic

Multiple Choice

Where does most of the energy go in this transformation.

• Electrical energy

• Light

• Heat

• other

Multiple Choice

What is this diagram called?

• Stankey Diagram

• Sankey Diagram

• Sankay Diagram

• Samkay Diagram

Multiple Choice

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

• 100%

• 7%

• 93%

• 95%

Multiple Choice

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

• 5%

• 50%

• 55%

• 100%

Multiple Choice

An iPhone charger coverts 75J of electricty in to 50J of charge and 25J of thermal energy. How efficient is the charger?

• 10%

• 100%

• 33%

• 67%

Multiple Choice

Which of these equations is correct?

• $$efficiency\ =\ \frac{useful\ energy\ transferred}{total\ energy\ transferred}$$  

• $$efficiency\ =\ \frac{total\ energy\ transferred}{useful\ energy\ transferred}$$  

• $$energy\ =\ efficiency\ \times100\%$$  

• $$efficiency\ =\ \frac{wasted\ energy\ transferred}{total\ energy\ tranferred}$$