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Mixture Of Science > Test 1 > Flashcards

Test 1 Flashcards

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Biology 101 flashcards
1
Q

All living organisms are made of ____.

A

Cells

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2
Q

What is an observation?

A

When looking at something in detail.

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3
Q

What is an element?

A

An element is a substance that can not break down into different substances.

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4
Q

What is a joint?

A

A part of the skeleton where two bones join together.

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5
Q

Is carbon dioxide a compound?

A

Yes.

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6
Q

What will happen to girls during puperty?

A

Breasts develop

Periods start

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7
Q

What will happen to boys during puperty?

A

Testes produce sperm

Voice deepens

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8
Q

What will happen to girls and boys during puperty?

A

Pubic hair grows

Growth spurt

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9
Q

State one example of an organ.

A

Brain,heart,lungs,stomach,kidney,bladder,intestine,liver

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10
Q

pH 1 is the strongest ___.

A

Acid.

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11
Q

pH 7 is ___.

A

Nuetral.

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12
Q

What is an universal indicator?

A

It is a mixture of different dyes.

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13
Q

State what an endothermic change is.

A

The surroundings transfer energy to substance.

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14
Q

State what happens during fertilisation in plants.

A

The nucleus of the pollen grain joins the nucleus of the ovule.

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15
Q

What is the periodic table?

A

It lists the elements.

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16
Q

Write down the chemical symbol of gold.

A

Au

17
Q

What is an atom?

A

An atom is the smallest part of an element that can exist.

18
Q

State what a compound is.

A

A compound is a substance made up of 2 or more substances.

19
Q

State what happens to the atoms in a chemical reaction.

A

Make new substances

Transfer energy to or from the surroundings.

20
Q

Why are chemical reactions useful?

A

It is because they can make useful substances. such as medicine,fabrics and building materials.

21
Q

State what a decomposition reaction is.

A

A chemical reaction in which a compound breaks down to form simpler compound or elements.

22
Q

State one difference between a base and an alkali.

A

A base is a substance that neutralises an acid.

An alkali is a soluble base.

Mixture Of Science (2 decks)

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