Grade 7 Science Unit 2 | Practice Workbook
Download the fillable and printable workbook (PDF). Save completed work privately. Read the matching student lesson before each set.
Day 1: Insects and body plans
- Name the three main regions of a typical adult insect.
- How many legs does an adult insect have?
- Where do the legs attach?
- Name one function of the head.
- Are all adult insects winged?
- How many legs does a spider have?
- Are spiders insects or arachnids?
- Explain why a spider and an insect can both be arthropods.
Day 2: Structures and functions
- What is a structure?
- What is a function?
- Give one sensory role of antennae.
- Which body region bears wings when present?
- Name a function of many beetles’ hard outer wings.
- What is molting?
- Identify the observation: a butterfly extends its proboscis into a flower.
- Give one inference about the butterfly and label it as an inference.
Day 3: Life cycles and metamorphosis
- List the stages of complete metamorphosis in order.
- What is a caterpillar in a butterfly life cycle?
- Which stage comes before the adult in complete metamorphosis?
- List the stages of incomplete metamorphosis.
- Give one example of an insect with incomplete metamorphosis.
- What process permits a nymph to grow?
- Does a nymph generally resemble its adult more than a butterfly larva does?
- Explain why fleshy prolegs should not simply be counted as adult insect legs.
Day 4: Classification and evidence
- What is a classification key?
- In the example key, what does eight legs suggest?
- In that key, what does six legs and hard protective front wings suggest?
- In that key, what do six legs and scaled wings suggest?
- Does the key identify every arthropod?
- Give one reason a damaged specimen may be hard to classify.
- Name two observations a student can record safely.
- Why should a student avoid handling an unknown animal?
Day 5: Independent science assessment
- Name the three main body regions of a typical adult insect.
- How many jointed legs attach to its thorax?
- Is a spider an insect? Explain using leg count.
- Put these stages in order: pupa, egg, adult, larva.
- Name the immature stage in incomplete metamorphosis.
- An adult animal has six legs and hard protective front wings. In the classroom key, what is it?
- A student sees an insect on a leaf and says it is eating the leaf. Which part is an inference?
- Write a two-sentence explanation of why a limited key cannot identify every animal.