Grade7-Semester 2- Revision | Baamboozle - Baamboozle

In a food chain which organism would be having the most bioaccumulation?

Apex predator

Examples of toxins that are involved in bioaccumulation

pesticides, mercury, insecticides

When you consume an organism, you only receive 10% of the energy, but how much of the toxins do you receive?

All of the toxins (｡•́︿•̀｡)

what is bioaccumulation

buildup of toxins in an organism

How does a solution become supersaturated?

dissolve more solute than you should be able to

The concentration of a mixture can be increased by____

Adding more powder" solute"

How could you change a saturated solution to an unsaturated solution?

Add solvent

Solutions are composed of

Solutes and solvents

The _____ is the thing being dissolved.

Solute

An example of Solvent

Water

AN example of solute

Any solid that dissolves- Salt, sugar

A compass needle responds to a magnetic field, because the compass needle is a

magnet

why does the compass needle move at different locations?

Because the needle is attracted to the magnetic field produced by the magnet

The area around a magnet is called the

magnetic field

what are the materials that make up a permanent magnet

Nickel, Cobalt, Iron

One component that our digestive system cannot digest

Fibre

Biuret test is done for

Protein

Test for iodine is done for

Presence of starch

What is the colour change when we test a food using Benedict solution?

Orange

After you mix two substances together, a new substance forms. This is an example of: Physical or chemical change

Chemical change

Have you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?

it is an endothermic

Baking bread and cooking an egg are examples of....?- Exothermic or endothermic process

Endothermic processes

Is photosynthesis an exothermic or endothermic reaction?

endothermic

What type of reaction occurs in a hand warmer

exothermic

In an endothermic reaction, heat is

taken in or absorbed

In an exothermic reaction, heat is ...

given out or released

Nicotine puts the most stress on which organ?

Heart

What is the relationship between nicotine and adrenaline?

nicotine triggers the release of adrenaline

Smoking interferes with the lungs' ability to provide what to the rest of the body?

Oxygen

Vaping and Hookah is much safer than cigarettes because they don't have any harmful chemicals like nicotine in it and they smell good.-True or False

False

Name of the chemical in tobacco that causes addiction

nicotine

Short-term effects of smoking.

increased heart rate, hand tremors , bad breath

A balanced diet is when the food eaten provide the ____(a)_____ amount of ____(b)______ needed by our body for healthy ______(c)_______ and developement.

(a) Correct (b) nutrients (c) growth

Eating liver is a great source of____________ which helps the body produce red blood cells to carry Oxygen

Iron

You consume 2 servings of ice cream, how many calories are you consuming? *150 calories per serving

300

Which nutrient provides the most amount of energy per gram?- carbohydrate/ fats/ protein/vitamin

Fat

Which is not essential in a balanced diet normally?

Any junk food

ways to increase the strength of an electromagnet

increasing the number of coils around the nail, increasing the number of batteries, making the core bigger.

Increasing the batteries increases the strength of an electromagnet-True or False

True

The pattern of magnetic field produced is not affected by the direction of the current that flows in the conductor.- True or False

True

The pattern of magnetic field depends on the shape of conductor.

True

A type of magnet that has temporary magnetic effect when electric current flows through it.

electromagnet

When light passess through this object, it is refracted off of one wall and reflected to another, the light is refracted again and as it leaves the object, it forms a rainbow. What is this object?

prism

When a ray of light moves from the air to water it bends due to a change in

speed

If you are wearing a black sweatshirt, what happens to most of the light that strikes the sweatshirt

is it absorbed

If you are wearing a yellow shirt, what is true of the light that strikes it?

yellow colour is reflected, everything else is absorbed.

Another name for light bending is ....

refraction

why do we see objects as white?

They reflect all light

Smooth surfaces _______ a lot of light.

reflect