7 Science - Dichotomous Keys - Revision

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

• physical features
• weather patterns
• environment
• diet

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

What is the name of bird W?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

What is the name of bird Z?

• Certhidea
• Geospiza
• Camarhynchus
• Platyspiza

What is a dichotomous key used for in science?

• To organize biomes
• Classify organisms
• Identify bacteria only
• None of these

A student discovers an arachnid with a segmented abdomen, long legs, and a tail with no stinger. The student uses the dichotomous key below to identify it. Which arachnid has the student found?

• Whip Scorpion
• Wind Scorpion
• Daddy long legs
• Scorpion

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

• Coleoptera
• Heteroptera
• Diptera
• Lepidoptera

What is monster # 1 ?

• Alienus quadlegicus

• Alienus haircus

• Alienus Tritoothicus

• Alienus Blobicus

What is monster # 3 ?

• Alienus Fuzzicus

• Alienus Stripicus

• Alienus Tritoothicus

• Alienus Blobicus

Using this dichotomous key, identify the name of the circled Fish, J.

• peacock flounder
• band-tail puffer
• trumpet fish
• spotted goat fish