Year 8 Science – Cells and Classification 1
Practise comparing plant and animal cells, linking organelles to photosynthesis and respiration, specialised cells, levels of organisation, microscope calculations and Australian adaptations. 20 questions. 25 minutes.
A student examines two cells under a microscope. Which conclusion is best supported by the table?
A cell in an underground potato tuber breaks down glucose to release energy. Which organelle carries out this process?
Choose the word that completes each blank.
Animal cells and plant cells both contain 1, but only plant cells contain 2.
Blank 1: mitochondria · chloroplasts · a cell wall
Blank 2: mitochondria · chloroplasts · nuclei
Which two substances are used up (the reactants) in cellular respiration?
Circle 2 words in the sentence below.
A cheek cell is an animal cell. Click the two structures from this list that it does NOT have.
cell wallnucleuschloroplastmitochondriamembrane
Students survey a bushland habitat and record air temperature, soil moisture and sunlight. What kind of features are these?
Choose the word that completes each blank.
In a scientific report, the 1 lists the steps that were followed, and the 2 records the measurements collected.
Blank 1: aim · conclusion · method
Blank 2: discussion · title · results
The platypus lays eggs and has a duck-like bill. Which feature is the best evidence that it is classified as a mammal?
Choose the word that completes each blank.
In photosynthesis, plants use light energy to change carbon dioxide and 1 into glucose and 2.
Blank 1: oxygen · water · nitrogen
Blank 2: oxygen · carbon dioxide · water
The stomach wall contains muscle tissue, gland tissue and nerve tissue working together. At which level of organisation is the stomach?
Circle 2 words in the sentence below.
Click the two invertebrates in this list.
kangaroobeetlelizardsnail
Choose the word that completes each blank.
Similar cells working together form a 1, and several of these working together form an 2.
Blank 1: organ · tissue · system
Blank 2: organism · organ system · organ
A root hair cell has a long, thin extension that grows out into the soil. How does this structure help the cell do its job?
Choose the word that completes each blank.
Red blood cells have no 1, which leaves more room inside the cell to carry 2.
Blank 1: nucleus · membrane · cytoplasm
Blank 2: glucose · DNA · oxygen
Why can an Amoeba survive without any specialised cells, while a kangaroo cannot?
Choose the word that completes each blank.
A eucalypt's thick, waxy leaves are a 1 adaptation that reduces 2 in hot, dry habitats.
Blank 1: structural · behavioural · physiological
Blank 2: growth · water loss · light absorption
A student wants a total magnification of ×100 using an eyepiece lens of ×10. Which objective lens should be used?
Circle 1 word in the sentence below.
Click the one structure in this list that is an organ.
neuronxylemstomachdigestive system
A student records the observations below. Which explains the results for the onion skin?
| Cells | Green structures per cell |
|---|---|
| Onion skin | 0 |
| Elodea leaf | About 25 |
Which list shows the levels of organisation from smallest to largest?