Term 3 and 4 revision yr 7 science

Term 3 and 4 revision yr 7 science

Chap 6.1 Basic Classification

• Classification is the process of putting things into groups

• Taxonomy is the science of classifying living things

• A key is a tool that can be used to classify things

• The simplest key is a dichotomous key (2 choices at each step)

• Keys can be written as diagrams or tables

Multiple Choice

Which organism does not have feathers but does have legs?

• Duck

• Hen

• Lizard

• Snake

Multiple Choice

Which organism does not have four limbs?

• Shark

• Salamander

• Tiger

• Gorilla

Multiple Choice

Which organism has feathers but does not swim?

• Duck

• Hen

• Lizard

• Snake

Multiple Choice

When using a dichotomous key to identify organisms, what do we look at?

• physical features
• weather patterns
• environment
• diet

Multiple Choice

What is the purpose of a dichotomous key?

• to find a common ancestor
• to show the evolution of organisms
• to show relationships between organisms
• to identify organisms

Multiple Choice

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

Multiple Choice

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?

• Juniper
• Pine
• Spruce
• Fir

Multiple Choice

What are the steps used to classify a fish from the top of the key downwards?

• no fur, no feathers, external fertilisation, gills in adult

• no feathers, gills in adults

• gills in adults

• no fur, no feathers, external fertilisation, no gills in adults