Year 7 Science Revision

Nature of science

Chemistry of Mixtures

Classification

Year 7 Science

Exam Topics

Nature of Science

Poll

How confident do you feel about answering questions about the Nature of Science on the exam?

• Not confident at all

• A little bit confident

• Pretty confident

• Very confident

Areas of Science

Multiple Choice

Which area of science studies the atmosphere and weather?

• Physics

• Meteorology

• Biology

• Chemistry

Multiple Choice

Which area of science studies plants?

• Botany

• Zoology

• Biology

• Ecology

Multiple Choice

Which area of science studies living things?

• Chemistry

• Astronomy

• Biology

• Ecology

Multiple Choice

Which area of science studies things outside of Earth like planets and stars?

• Chemistry

• Physics

• Biology

• Astronomy

Multiple Choice

Which area of science studies fossils of animals and plants?

• Zoology

• Paleontology

• Biology

• Botany

Lab Equipment

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Bunsen Burner

Draw

Draw an arrow pointing to the base of a Bunsen burner

Draw

Draw an arrow pointing to the collar of a Bunsen burner

Draw

Draw an arrow pointing to the air hole of a Bunsen burner

Draw

Draw an arrow pointing to the gas tube of a Bunsen burner

Draw

Draw an arrow pointing to coldest part of the flame

Scientific Method

The Scientific Method

Remember the following?

Independent variable - The part the is being changed

Dependent variable - The part that changes depending on the independent variable

Controlled variable - The part that does not change

The Scientific Method

Ella is conducting an experiment

She heard from someone that music helps plants grow. She puts two of the same types of plant in separate areas and only plays music to one.

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The Scientific Method

Simon is conducting an experiment

He wants to test if a remote controlled toy car is faster grass or concrete. He measures five meters out and times how long it takes to drive the car over grass and concrete.

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Poll

Now, do you feel more confident about answering questions about the Nature of Science on the exam?

• Much more confident

• A bit more confident

• About the same

• Less confident

Chemistry of Mixtures

​Elements

Compounds

Mixtures

Homogenous vs. Heterogenous

Solubility

Solute + Solvent = Solution

Solution

Suspension

Colloid

Separation Methods

Decanting

Sieving

Filtering

Magnetic Separation

Hand picking

Evaporating

Distillation

Centrifuging

Chromatography

Poll

How confident do you feel about answering questions about the Chemistry of Mixtures on the exam?

• Not confident at all

• A little bit confident

• Pretty confident

• Very confident

A pure substance that cannot be broken down.
E.g. gold, copper, iron, helium, hydrogen, oxygen.

Element

A pure substance that CAN be broken down.

E.g. Water is made of hydrogen and oxygen

Compound

An impure substance that is made of a variety of elements and compounds.

Mixture

Multiple Select

Which of the following is an example of an Element?

• Gold

• Water

• Juice

• Iron

• Helium

Multiple Select

Which of the following is an example of a Compound?

• Tomato sauce

• Water

• Salt

• Copper

• Hydrogen

Multiple Select

Which of the following is an example of a Mixture?

• Bubble tea

• Oxygen

• Mercury

• Juice

• Sugar

Mixture is uneven

Mixture is smooth

Homogenous vs. Heterogenous

Draw

Put a RED circle around the homogenous mixtures and a BLUE circle around the heterogenous mixtures

Solubility

"How well something dissolves"

Solute: the substance being dissolved
e.g. salt, sugar, instant coffee, baking soda

Solvent: the substance that the solute is dissolved in

e.g. water, vinegar

Solution: the mixture of a solute and a solvent

Draw

Put a circle around the solvent in the image below

Draw

Put a circle around the solution in the image below

Draw

Put a circle around the solute in the image below

Multiple Choice

Alvin mixes baking soda and vinegar together to make a cleaning solution. The vinegar would be the ________

• Solution

• Solvent

• Solute

Multiple Choice

Alvin mixes baking soda and vinegar together to make a cleaning solution. The baking soda would be the ________

• Solution

• Solvent

• Solute

Types of Mixtures

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Separation

Methods

Multiple Choice

What separation method is being used in the image shown?

• decanting

• filtering

• hand picking

• distillation

Multiple Choice

What separation method is being used in the image shown?

• evaporating

• centrifuging

• chromatography

• distillation

Multiple Choice

What separation method is being used in the image shown?

• evaporating

• filtering

• distilation

• decanting

Multiple Choice

What separation method is being used in the image shown?

• sieving

• filtering

• hand picking

• decanting

Multiple Choice

What separation method is being used to separate water from salt?

• centrifuging

• filtering

• decanting

• evaporating

Multiple Choice

What separation method is being used in the image shown?

• sieving

• filtering

• hand picking

• magnetic separation

Multiple Select

Which of the following methods could be used to separate flour from nails?

• magnetic separation

• sieving

• distilling

• decanting

• hand picking

Poll

Now, do you feel more confident about answering questions about the Chemistry of Mixtures on the exam?

• Much more confident

• A bit more confident

• About the same

• Less confident

Classification

​MRS C GREN

Unicellular vs multicellular

Eukaryotic vs prokaryotic

The Five Kingdoms

Animalia

Fungi Plantae Protista Monera

​Scientific Names

Dichotomous

Keys

Poll

How confident do you feel about answering questions about Classification on the exam?

• Not confident at all

• A little bit confident

• Pretty confident

• Very confident

​MRS C GREN

Open Ended

Using MRS C GREN, write three ways you know that a parrot is a living organism.

Open Ended

Using MRS C GREN, write three ways you know that plants are living organisms.

Multiple Select

Which of the following are multicellular organisms?

• Bacteria

• Ducks

• Humans

• Cactus

• Viruses

Multiple Select

Which of the following are unicellular organisms?

• Bacteria

• Amoeba

• Penguin

• Yeast

• Coral

Multiple Choice

Prokaryotic cells have a nucleus (brain)

• True

• False

Multiple Choice

Animals and plants have eukaryotic cells

• True

• False

Multiple Choice

Bacteria has prokaryotic cells

• True

• False

Draw

Put a circle around every organism that is part of the Animalia Kingdom

Draw

Put a circle around every organism that is part of the Plantae Kingdom

Draw

Put a circle around every organism that is part of the NOT part of the Animalia Kingdom

Multiple Choice

Which kingdom is a mushroom a part of?

• Animalia

• Plantae

• Fungi

• Protista

• Monera

Multiple Choice

Which kingdom are fish a part of?

• Animalia

• Plantae

• Fungi

• Protista

• Monera

Multiple Choice

Which kingdom is algae a part of?

• Animalia

• Plantae

• Fungi

• Protista

• Monera

Multiple Choice

Which kingdom is a bacteria a part of?

• Animalia

• Plantae

• Fungi

• Protista

• Monera

Multiple Choice

Which kingdom are flowers a part of?

• Animalia

• Plantae

• Fungi

• Protista

• Monera

Dichotomous Keys

Multiple Choice

Use the dichotomous key shown to determine what kind of flower is pictured.

• Starflower

• Chickweed

• Common Strawberry

• Bowman's Root

Multiple Choice

Use the dichotomous key shown to determine what kind of shark is pictured.

• Hammerhead

• Saw Shark

• Great White

• Cow Shark

Multiple Choice

Use the dichotomous key shown to determine the scientific name for a wolf.

• Vipera aspis

• Haliaeetus leucocephalus

• Danus plexippus

• Canis lupis

• Chelonia mydas

Multiple Choice

Use the dichotomous key shown to determine the scientific name for a turtle.

• Vipera aspis

• Haliaeetus leucocephalus

• Danus plexippus

• Canis lupis

• Chelonia mydas

Multiple Choice

Use the dichotomous key shown to determine the scientific name for a turtle.

• Vipera aspis

• Haliaeetus leucocephalus

• Danus plexippus

• Canis lupis

• Chelonia mydas

Multiple Choice

Use the dichotomous key shown to determine the scientific name for a turtle.

• Vipera aspis

• Haliaeetus leucocephalus

• Danus plexippus

• Canis lupis

• Chelonia mydas

Poll

Now, do you feel more confident about answering questions about Classification on the exam?

• Much more confident

• A bit more confident

• About the same

• Less confident