science year 9 1

How is low hazard symbol and its control/ safety instructions

No symbol. No eating/drinking, hair tied back, working= standing up, clear desk. Follow all standard practical rules.

Irritant symbol and control/safety instructions

Exclamation mark. Wear googles. If it contacts skin, rinse under cold water. Inform teacher if spilt. May cause: redness, soreness and itching. Can cause damage and harm.

Corrosive symbol and control/safety instructions

Two tubes, liquid spilling out, on the left a brick image corroding and on right a hand.

Wear goggles, gloves and a lab coat. Work in a fume hood.

Flammable symbol and control/safety instructions

Flame with floor underneath. Turn off any ignition sources. Example: Bunsen burners.

Why do we use fume cupboards?

So you don’t breathe in acid fumes. Acids at high concentrations can evaporate and the fume can cause damage.

Why are higher concentrations of acids more dangerous?

Means the faster the reaction and the higher the damage.

Independent variable defenition

What you changed

Dependent variable defenition

What you measured

Controlled variable definition

What you keep the same

In a ph scale, what numbers acids and neutral and alkaline, also include their colors.

0-6=acidic, goes from red to greenish color.

7=neutral, green

8-14=alkaline, from dark green to purple

In line graph, what goes in y-axis and x-axis.

(In,con,dep)

Independent variable goes on the x-axis, dependent variable goes on the y-axis.

The 4 main steps to do a line graph

1) scale with constant intervals

2)label and units

3) data

4) line of best fit(do not join dots).

Rainbow fizz experiment:what was used in each of the six test tubes

1= acid and ph indicator

2=acid and ph indicator (less acid)

3=ph indicator

4=base and ph Indicator (less base)

5= base and ph indicator (a bit less base)

6= base and ph indicator( more base)

Rainbow fizz experiment: hazards and risks

Acid=damage hair and irritates skin

Chemical spillage=may fall on floor on skin

Obstacles=trip over/accident

Water=slipper surface

Density equation

Density =mass/volume

P=m/v

P=💗

Should you poor down the sink acids?

No, if these acids are corrosive, they can cause issues through the pipe as it may corrode. Not only that but we don’t know we’re the water goes and may endanger animals if they drink it. It is fine if the teacher says so or grown up but if not, no.

How specific physical or behavioral adaptations help organisms survive in particular environments

Organisms adapt to environment to be able to survive and reproduce

How has snow foxes adapted to survive the cold?

Fur protect from cold and hides them from predators. Smallears to prevent heat loss. Black eyes to prevent snow blindness. Sensitive ears to know were prey or predator is. Paws designed to stand cold.

How have cactus adapted to survive cold?

Has spikes to protect from predators. Water inside so it doesn’t die.resists sun heat and lack of water,

Behavioral adaptations defenition

Are behaviors which give animals an advantage. This includes: mating rituals or working in packs.

Structural adaptations defenition

Physical features that give animals an advantage organism a survival advantage. This includes: its shape or colour.

Ecosystem defenition

A community made up of living things (animals, plants and microbes) and non living things (air, water and soil) that al, interact with each other in a particular environment.

Biotic defenition

Living things

Abiotic defenition

Non living things

What happens when one factor of the ecosystem changes?

Species may die causing change or downfall in ecosystem. This might cause other species to find other foods, migrate or die. This may cause species to change completely.

Biodiversity defenition

Variety of living things in an ecosystem. This includes all different species of animals, plants, fungi and tiny organisms, as well as differences within species and the ecosystems they live in. This includes every single thing in the ecosystem.

What might explain the differences in biodiversity between quadrants?

Amount of sunlight

If it is a part of a trail

Type of soil

Amount of water.

Dichotomous keys defenition

Helps you identify living things by asking a series of questions with only 2 possible answers at each step (like yes or no)

Interdependence defenition

When living things in an ecosystem rely on each other to survive.

If one species is affected, it can impact many others in the food chain/food web.

Why is biodiversity important for interdependence?

Biodiversity means having many different types of plants,animals and microorganisms in an ecosystem. This is important for interdependence because:

-the more species there are, the more connections exists in the food web.

-if one species disappears, others can still survive because they have other food sources or partners.

-it makes ecosystems more stable and resilient.

Food web defenition

Represent various food chains and more than one species. Can represent a whole ecosystem. Unlike food chains, it can represent animals and species through pictures instead of questions.

Predators defenition

These animals eat other animals

Producer defenition

Energy is gained from the sun and they are able to make their own food.

Consumer defenition

These animals eat plants and other animals. They don’t make their own food.

Pray defenition

These animals are eaten by other animals.

In a paragraph question with the word explain, how do you respond ?

You respond with a because.