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Science: Middle School: Grades 6, 7 and 8 Quiz - Muscles (Questions)

This Science quiz is called 'Muscles' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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Muscles are tissues that produce movement in the bodies of animals and humans. They are made from stretchy bundles of protein fibers. Did you know that the word 'muscle' comes from the Latin name for 'mouse'? This is because muscles, when contracting and relaxing, reminded people of how mice move. Next time you're checking your biceps, have a look in the mirror to see if you agree!

Do animals all have muscles or is it just humans who do? Contracting your biceps leads to which muscle relaxing? See what you know about muscles by taking this science quiz.

What are muscles made from?

[ ]	Fat cells
[ ]	Thin strands of iron
[ ]	Thousands of small stretchy fibers
[ ]	Carbohydrates

How do voluntary muscles always work?

[ ]	Voluntary muscles always work on their own
[ ]	Voluntary muscles always work in pairs
[ ]	Voluntary muscles always work in groups of three
[ ]	Voluntary muscles always contract at the same time

When you contract your bicep, what happens?

[ ]	Your tricep relaxes
[ ]	Your other bicep also contracts
[ ]	Your arm lowers
[ ]	Nothing else happens

What attaches muscles to the skeleton?

[ ]	Ligaments
[ ]	Joints
[ ]	Tendons
[ ]	Arteries

Which of these is not an involuntary muscle?

[ ]	The heart
[ ]	The diaphragm
[ ]	The muscles lining the stomach
[ ]	The tongue

Skeletal muscles are usually attached to bones at both ends. Which muscle is an exception?

[ ]	The tongue
[ ]	The gluteus maximus
[ ]	Pectorals
[ ]	Triceps

What do your muscles need in order to work?

[ ]	Carbon dioxide and energy
[ ]	Oxygen and food
[ ]	Nitrogen and energy
[ ]	Carbon dioxide and blood

Exercise makes muscles do what?

[ ]	Grow bigger and stronger
[ ]	Grow smaller and weaker
[ ]	Become less stretchy
[ ]	Become less effective

Your facial muscles allow you to do what?

[ ]	To use your brain
[ ]	To make different facial expressions
[ ]	To hear
[ ]	To lift heavy weights

10.

Which of these is not true?

[ ]	Snakes have very strong muscles to help them move
[ ]	Some insects have thousands of muscles
[ ]	Humans are the only animals with muscles
[ ]	Birds need powerful muscles in order to fly

Science: Middle School: Grades 6, 7 and 8 Quiz - Muscles (Answers)

What are muscles made from?

[ ]	Fat cells
[ ]	Thin strands of iron
[x]	Thousands of small stretchy fibers
[ ]	Carbohydrates

Each muscle is actually a bundle of small stretchy fibers made from protein

How do voluntary muscles always work?

[ ]	Voluntary muscles always work on their own
[x]	Voluntary muscles always work in pairs
[ ]	Voluntary muscles always work in groups of three
[ ]	Voluntary muscles always contract at the same time

Voluntary muscles are the muscles you can control. They are also called 'skeletal' muscles. Involuntary muscles are also called 'smooth' muscles

When you contract your bicep, what happens?

[x]	Your tricep relaxes
[ ]	Your other bicep also contracts
[ ]	Your arm lowers
[ ]	Nothing else happens

Muscles work in pairs: when you contract your tricep, your bicep relaxes and when you contract your bicep, your tricep relaxes

What attaches muscles to the skeleton?

[ ]	Ligaments
[ ]	Joints
[x]	Tendons
[ ]	Arteries

Ligaments hold bones together at the joints

Which of these is not an involuntary muscle?

[ ]	The heart
[ ]	The diaphragm
[ ]	The muscles lining the stomach
[x]	The tongue

The diaphragm (the powerful muscle under your lungs) is interesting - you don't need to make it contract (because it's involuntary), but you can if you want to. That's why people can control their breathing but don't have to think about every breath

Skeletal muscles are usually attached to bones at both ends. Which muscle is an exception?

[x]	The tongue
[ ]	The gluteus maximus
[ ]	Pectorals
[ ]	Triceps

The tongue is only connected at one end - otherwise, how would you be able to chew and swallow, or even talk?

What do your muscles need in order to work?

[ ]	Carbon dioxide and energy
[x]	Oxygen and food
[ ]	Nitrogen and energy
[ ]	Carbon dioxide and blood

The cells in the muscles can convert oxygen and food into energy

Exercise makes muscles do what?

[x]	Grow bigger and stronger
[ ]	Grow smaller and weaker
[ ]	Become less stretchy
[ ]	Become less effective

The more you use a muscle the bigger and stronger it gets, but if you don't use it, a muscle gets smaller and weaker

Your facial muscles allow you to do what?

[ ]	To use your brain
[x]	To make different facial expressions
[ ]	To hear
[ ]	To lift heavy weights

You have more than 30 facial muscles. These allow you to make an enormous range of facial expressions

10.

Which of these is not true?

[ ]	Snakes have very strong muscles to help them move
[ ]	Some insects have thousands of muscles
[x]	Humans are the only animals with muscles
[ ]	Birds need powerful muscles in order to fly

All animals have muscles