Observation and Inference

Which of these is a quantitative observation?

• The rock is heavy

• The rock weighs 10 kg

• The rock is gray

• The rock feels rough

Which of these is a qualitative observation?

• The flower is red

• The flower is 10 cm tall

• The flower weighs 2 grams

• The flower has 5 petals

An inference is:

• A direct fact from senses

• A logical guess based on observations

• A measurement

• A scientific law

Which is an observation, not an inference?

• The sky is blue

• It will probably rain

• That cloud looks angry

• The person must be tired

True or False: Observations must always be made using instruments.

• TRUE

• FALSE

True or False: Inferences are always correct.

• TRUE

• FALSE

Which of these is an inference?

• The liquid is bubbling

• The liquid must be boiling

• The liquid is 50 mL

• The liquid is red

When you count 12 fish in a pond, this is:

• Qualitative observation

• Quantitative observation

• Inference

• Opinion

'The footprint in the mud means an animal passed by' is a(n):

• Observation

• Inference

• Measurement

• Fact

Select all that apply: Which are examples of observations?

• The leaf is green

• The leaf has 7 spots

• The leaf is poisonous

• The leaf is rough