BIGGGG science test

What does HHPS stand for?

Hazardous household product symbols

What does this mean?

Danger

What does this mean?

Warning

What does this mean?

Caution

What does WHMIS stand for?

Workplace hazardous materials information system

What does this mean?

Toxic

What does this mean?

Flammable

What does this mean?

Explosive

What does this mean?

Corrosive

What does this mean?

Compressed gas

What does this mean?

Oxidizing

What does this mean?

Health hazard

What does this mean?

Harmful/irritant

What does this mean?

Danger for the environment

What does this mean?

Biohazardous infectious materials

What is the scientific method?

A systematic process used to investigate questions and test explanations using evidence

What is a hypothesis?

A testable prediction explanation based on observations or prior knowledge

What is a variable?

A factor that can change in an experiment

What is the independent variable?

The factor that the experimenter deliberately changes

What is the dependent variable?

The factor that is measured or observed to see how it responds to the independent variable

What are the controlled variables?

Factors kept the same to make the experiment fair

What is the engineering design process?

A process used to identify a problem and design test and improve a solution

What are the main steps of the engineering design process?

Identify the problem, research, brainstorm solutions, choose a design, build a prototype, test it, improve it, and communicate the results

What is matter?

Anything that has mass and takes up space

What is a pure substance?

Matter made of only one type of particle. Examples water, and pure oxygen

What are the two types of pure substances?

Elements and compounds

What is an element?

A pure substance made or only one atom and is on the periodic table of elements. Examples gold, or oxygen

What is a compound?

A pure substance made of two or more different elements chemically bonded in a fixed ratio. Example water (H2O)

What is a mixture?

Two or more substances physically combined, not chemically bonded to form a new substance

What is a homogeneous mixture?

A mixture that looks uniform throughout. Example salt water

What is a heterogeneous mixture?

A mixture that is not uniform throughout. Example oil and water or a salad

How can u separate a mixture?

Using physical methods such as filtration, evaporation, distillation

What is the difference between a gas and a vapour?

A gas is a substance normally in the gaseous state at room temperature. A vapour is the gaseous form of a substance that is normally a liquid or solid at room temperature

How are particles arranged in a solid?

They are packed closely together in fixed positions and vibrate in place

How are particles arranged in a liquid?

They are close together but csn move and slide past one another

How are particles arranged in a gas?

they are far apart and move rapidly in random directions

What is a physical property?

A characteristic that can be observed or measured without changing a substance into a different substance

What is a chemical property?

A characteristic describing a substances ability to undergo a chemical change and form new substances

Give five examples of physical properties

Colour, odour, state, melting point and density

Give three examples of chemical properties

Flammability, ability to rust or corrode, and able to react with acids or oxygen

What is a qualitative property?

A property described using words or observations and not measurements

What is a quantitative property?

A property expresses using numbers and measurements

Is “the metal shiny” qualitative or quantitative?

Qualitative

Is “the metal has a mass of 15 g” qualitative or quantitative

Quantitative

An object has a mass of 20 g and a volume of 5 cm3 what is the density?

4 g/cm3

An object has a density of 3 g/mL and a volume of 4mL what is it’s mass?

12 g

An object has a mass of 30 g and a density of 6 g/cm3 what is the volume?

5 cm3

What usually happens when an object is less dense than the liquid it is placed in?

It floats

Two objects has the same volume. Which has the greater density

The object with the greater mass

What is a physical change?

A change in size, shape, or state

What is a chemical change?

A change in which one or more new substances from a chemical reaction. Like colour change, odour, hard to reverse and more

What is a precipitate?

An insoluble solid that forms when substances react in a solution

What colour is the flame when the air hole is mostly closed?

Usually yellow or orange

What colour is the flame when the air hole is open?

Blue

What safety steps should u follow when using a Bunsen burner

Tie back long hair, secure loose clothing, wear goggles, shock equipment, keep flammable materials away, never leave it unattended

How do u test for for oxygen?

A glowing splint relights in oxygen

How do u test for hydrogen?

A lit splint produces a characteristic “pop”

How do u test for carbon dioxide?

Bubble it through limewater and if it turns milky or cloudy

Which gas relights a glowing splint?

Oxygen

Which gas gives a pop in the splint test

Hydrogen

Which gas turns limewater milky?

Carbon dioxide

Is toothpaste a mixture or pure substance?

Mixture

Is tap water a mixture or pure substance?

Mixture. It would only be a pure substance if it was pure water

Is salt water a mixture or pure substance?

Mixture

Is gold a mixture or pure substance?

Pure Substance - element

Is oxygen a mixture or pure substance

Pure substance - element

Is pure water a mixture or pure stubstance

Pure substance - compound

Is carbon dioxide a mixture or pure substance!

Pure substance - compound

Oxygen at room temperature. Gas or vapour?

Gas

Nitrogen at room temperature. Gas or vapour

Gas

Helium at room temperature. Gas or vapour?

Gas

Water vapour. Gas or vapour?

Vapour

Steam from boiling water. Gas or vapour?

Water vapour

Vapour from rubbing alcohol. Gas or vapour?

Vapour