Science Lab Equipment and Safety Symbols

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Questions and Answers

Which energy source is associated with the release of the most carbon dioxide?

Hydroelectric

Fossil fuels (correct)

Nuclear

Solar

Which of the following energy sources is considered carbon neutral?

Bioenergy (correct)

Wind

Hydroelectric

Geothermal

Which of these energy sources can potentially disrupt fish migration?

Solar

Geothermal

Wind

Hydroelectric (correct)

Which energy source is associated with the production of radioactive waste?

Nuclear (D) Signup and view all the answers

Which energy production method is known to produce noise pollution?

Wind (D) Signup and view all the answers

Which of the following is a direct consequence of burning fossil fuels?

Acid rain (B) Signup and view all the answers

Which of these energy sources involves the use of heat from the Earth's interior?

Geothermal (C) Signup and view all the answers

Which of these energy sources is associated with the production of material waste?

Solar (D) Signup and view all the answers

Which term refers to the living components of an ecosystem?

Biotic (C) Signup and view all the answers

What role does a decomposer play in an ecosystem?

Breaks down dead organisms and adds nitrates to soil (A) Signup and view all the answers

Which component of the Earth system is described as the layer of gases around the planet?

Atmosphere (A) Signup and view all the answers

What would be the consequence of removing hawks from a food web?

Increase in primary consumer populations (A) Signup and view all the answers

Which process describes the conversion of nitrates in soil back into nitrogen gas?

Denitrification (A) Signup and view all the answers

Which description fits an alkali metal?

First on the left; shiny, silver, soft solids; very reactive; 1 electron in outer shell. (B) Signup and view all the answers

What occurs when two liquids mix to form a solid?

Precipitation (A) Signup and view all the answers

Which of the following best describes noble gases?

Found in the far right family; unreactive; full outer shell. (D) Signup and view all the answers

In the context of the periodic table, what do the terms 'family' and 'period' refer to?

Family refers to columns of elements with similar properties, while period refers to different rows. (D) Signup and view all the answers

What is produced during a combustion reaction?

Heat and light. (B) Signup and view all the answers

Which of the following represents a controlled variable in an experiment about paper planes?

Mass of the plane (A) Signup and view all the answers

What does the WHMIS symbol for 'Flammable Material' indicate?

Substance can ignite easily (B) Signup and view all the answers

Which of the following properties describes the characteristic of ductility?

Ability to be pulled into wires (C) Signup and view all the answers

For a piece of metal with a mass of 290 g and a volume of 36.7 mL, what is the correct density calculation?

$8.0 ext{ g/mL}$ (D) Signup and view all the answers

Which statement correctly differentiates between qualitative and quantitative properties?

Qualitative properties describe characteristics, while quantitative properties involve measurements. (A) Signup and view all the answers

What is the significance of clarity in material properties?

It assesses how transparent, translucent, or opaque the material is. (C) Signup and view all the answers

In the context of WHMIS, which symbol represents a toxic substance?

A skull and crossbones (B) Signup and view all the answers

When assessing the viscosity of a liquid, which one of the following indicates a high viscosity?

Honey slowly flowing (B) Signup and view all the answers

Study Notes

Equipment and Function

Bunsen burner (4 steps): Used for heating, has a gas inlet, metal base, and metal tubes.
Beaker: Used for holding and mixing liquids, has a cylindrical shape.
Test tube: Used for holding small samples of substance.
Retort stand: Holds test tubes & other equipment.
Clamps: Hold things steady in place.
Goggles: Eye protection.
Gloves: Hand protection.
Distilled water: To complete tests and measure.
Wire gauze: Protects glassware, and evenly distributes heat.
Graduated cylinder: Used to measure volumes of liquid, cylindrical shape with varying markings
Electronic balance: Used to measure mass.
Plastic Items: used for insulation

WHMIS Symbols

Skull and crossbones: Poisonous substance
Lightning Bolt: Health hazard
Exclamation mark: Caution
Dead fish: Environmental hazard

Independent, Dependent, and Controlled Variables

Independent Variable: The factor that is purposely changed in an experiment.
Dependent Variable: The factor that is measured in an experiment.
Controlled Variable: The variables that are kept the same in an experiment

Paper Plane Experiment

Variables:
- Distance traveled : dependent
- Material of plane : independent
- Wind speed : controlled
- Mass of the plane : controlled
- How the plane is thrown : controlled

Properties of Materials

Chalk: Solid, opaque, white, soft
Table Syrup: High viscosity, liquid, brown, transparent

Calculating Density

Density (D) = mass (m)/ volume (V)

Properties of Solids and Liquids

Solids are typically hard and have fixed shapes.
Liquids take the shape of their container.
Gases have no fixed shape or volume.

Qualitative vs. Quantitative Properties

Qualitative properties describe qualities (e.g., color, texture)
Quantitative properties describe quantities (e.g., mass, volume)

Chemical vs. Physical Changes

Physical changes alter the appearance or state of matter without changing its chemical composition .
Chemical changes alter the chemical composition of a substance, often with observable changes.

Periodic Table

Valence electrons in the outer shell determine an element's reactivity.
Elements in the same column have similar properties.

Energy Generation

Power generation uses turbines (blades) linked to generators to create electricity.
Turbine converts kinetic energy to electricity
Power generation involves wind, water, steam etc...
Methods used for generating electricity vary
renewable & non-renewable

Types of Generation

Fossil fuels: Releases large amounts of carbon dioxide, considered non-renewable
Geothermal: Uses heat from the earth's core
Biomass: Renewables and less polluting.
Hydroelectric dams: Large dams use water to create electricity.
Solar Energy: Solar powered plants use solar energy to produce electricity, renewable.
Wind energy: Wind turbines use wind energy to produce electricity, renewable.
Nuclear energy: Nuclear power plants use nuclear reactions to create heat, potentially damaging to the environment.
Natural Gas: A fossil fuel with a large environmental impact that is used to produce electricity.

Light Bulb Efficiency

Efficiency = (useful output/total input energy) x 100
Measures the ratio of useful energy output to total energy input.

Charging by Rubbing

Materials like fur and ebonite become charged by friction.
They gain opposite charges through an electron transfer process.

Electrical Circuits

Simple circuits contain wires, batteries, light bulbs and switches in a continuous flow.
Components may be connected in parallel or series
Circuits need a complete path for current flow

Electric Charge

Negatively charged objects attract positively charged objects.

Environmental Impacts

Human activities have led to pollution affecting ecosystems.
Pollutants harm or damage parts of the environment.

Ecosystems

Ecosystems are interconnected by biotic (living) and abiotic (non-living) factors.
Organisms interact within their environment to form food webs, food chains and ecosystems.
Complex relationships exist among living organisms and their environment.

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Description

This quiz covers essential science lab equipment, their functions, and safety symbols according to WHMIS. Test your knowledge on items like Bunsen burners, beakers, and goggles, along with the significance of hazard symbols. Perfect for students learning about laboratory procedures and safety protocols.