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Year 9 in England

8th grade science

Every 8th grade science skill on Eurekami: 35 skills in 13 areas, each with a worked example, free practice that checks answers as you go, and printable worksheets with answer keys.

Mixed 8th grade review

Ten questions from across the year, a quick way to see what is secure and what needs another look.

Animals and habitats

Classification levels and scientific (binomial) names

CCSS NGSS.MS-LS4-2England: GCSE Biology: Classification of living organisms

Example

Which two organisms are most closely related? Canis lupus, Ailuropoda melanoleuca, Ursus maritimus, Ursus arctos

  1. Polar bears and brown bears share the genus Ursus.
  2. So the answer is: Ursus maritimus + Ursus arctos

Answer: Ursus maritimus + Ursus arctos

Builds on: Sort living things into kingdoms

Leads to: Read cladograms and shared derived traits

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Ecosystems and food chains

Structural, behavioural and functional adaptations

CCSS NGSS.MS-LS4-4CCSS NGSS.HS-LS4-4England: GCSE Combined Science: Ecology (adaptations)

Example

What type of adaptation is this: a camel producing very little urine?

  1. Functional adaptations are processes inside the body.
  2. So the answer is: functional (body processes)

Answer: functional (body processes)

Builds on: Adaptations to habitats

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Materials and their properties

Pure substances, mixtures and chromatography

CCSS NGSS.MS-PS1-2England: KS3 Chemistry: Pure and impure substancesEngland: KS4 Combined Science: Chemical analysis

Example

In a chromatogram the solvent moved 5 cm and a dye spot moved 1 cm from the start line. What is the Rf value of the dye? (Give 2 decimal places.)

  1. 1 ÷ 5 = 0.2
  2. So the answer is: 0.2

Answer: 0.2

Builds on: Separating mixtures

Leads to: Calculate and use Rf values in chromatography

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States of matter

Find density using water displacement

CCSS NGSS.MS-PS1-2CCSS NGSS.SEP 3England: KS3 Physics: Matter (density)England: GCSE Combined Science: Particle model of matter (required practical: density)

Example

A measuring cylinder contains 50 cm³ of water. When a stone is lowered in, the level rises to 62 cm³. What is the volume of the stone, in cm³?

  1. 62 − 50 = 12
  2. So the answer is: 12 cm³

Answer: 12 cm³

Builds on: Density

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Energy

Conservation of energy and wasted energy

CCSS NGSS.MS-PS3-5CCSS NGSS.HS-PS3-1England: KS3 Physics: Energy (changes in systems)England: KS4 Combined Science: Energy

Example

A speaker is supplied with 200 J of energy. It transfers 80 J usefully. How much energy is wasted, in J?

  1. 200 − 80 = 120
  2. So the answer is: 120 J

Answer: 120 J

Builds on: How devices transfer energy

Leads to: Kinetic and gravitational potential energy, Efficiency, Use energy conservation to find speeds and heights

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Light, sound and waves

Transverse and longitudinal waves

CCSS NGSS.MS-PS4-1CCSS NGSS.HS-PS4-1England: KS3 Physics: WavesEngland: GCSE Combined Science: Waves

Example

Is this a transverse or a longitudinal wave: seismic P waves?

  1. In longitudinal waves, vibrations are parallel to the direction the wave travels.
  2. So the answer is: longitudinal

Answer: longitudinal

Builds on: Parts of a wave, How sound travels through solids, liquids and gases

Leads to: Seismic waves as evidence for Earth's layers

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Earth and rocks

Earth's 4.6-billion-year history on a timeline

CCSS NGSS.MS-ESS1-4England: KS3 Chemistry: Earth and atmosphereEngland: KS3 Biology: Evolution

Example

Imagine Earth's 4.6-billion-year history squeezed into one 24-hour day. How many minutes before midnight the first flowering plants appeared (130 million years ago)? Give 1 decimal place.

  1. 130 ÷ 4600 = 0.02826
  2. 0.02826 × 1440 = 40.7
  3. So the answer is: 40.7 min

Answer: 40.7 min

Builds on: Use rock layers to put events in order

Leads to: How Earth's atmosphere changed over time, Date rocks and fossils with radioactive decay

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Weather and climate

The greenhouse effect and climate change

CCSS NGSS.MS-ESS3-5CCSS NGSS.HS-ESS3-5CCSS NGSS.HS-ESS2-4England: KS3 Chemistry: Earth and atmosphereEngland: KS4 Combined Science: Earth and atmospheric science

Example

Which is an effect of climate change?

  1. Melting ice and warming oceans raise sea levels; extreme weather becomes more frequent.
  2. So the answer is: rising sea levels as ice melts and seawater expands

Answer: rising sea levels as ice melts and seawater expands

Builds on: Weather and climate zones, Decomposers and recycling nutrients

Leads to: Carbon footprints and ways to cut emissions, Analyse climate data: CO₂ records and temperature trends

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Global winds, ocean currents and climate zones

CCSS NGSS.MS-ESS2-6England: KS3 Geography: Weather and climateEngland: KS3 Physics: Energy (convection)

Example

Why do coastal places have smaller temperature ranges than inland places?

  1. The sea moderates coastal climates: cooler summers and milder winters.
  2. So the answer is: Water heats up and cools down more slowly than land

Answer: Water heats up and cools down more slowly than land

Builds on: Air pressure, fronts and forecasting the weather, Conduction, convection and radiation

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8th grade Science: Skills, Practice, Worksheets | Eurekami