SME
Grade 2 Science · Life Science
Investigating what plants need to grow
Use this for “How many more green leaves grew on the plant in the sun?”
Picture
Leaves on the sunny plant: 14
Leaves on the shady plant: 5.
Leaves on the sunny plant: 9 more leaves.
This is an example. Type the numbers from your problem to start.
Leaves on the sunny plant
example
Leaves on the shady plant
example
More leaves in the sun
answer
Number sentences
14 − 5 = 9
Good to know
•
Grow two plants the same way, except one gets sunlight and one does not.
•
Water both the same. After two weeks, count the green leaves on each.
•
A plant with no sun grows thin and pale. It may be tall, but it has few green leaves.
Step-by-step
WE KNOW
Leaves on the sunny plant: 14
Leaves on the shady plant: 5
FIND
more leaves in the sun
Step 1 · Find more leaves in the sun
14 − 5 = ?
Count up from the shady plant’s leaves to the sunny plant’s. That is how many more leaves.
5 + 5 = 10
10 + 4 = 14
Jumps: 5 + 4 = 9
More leaves in the sun: 9
Check
Put the numbers back in. Both sides should match.
14 − 5 = 9 ✓
Topic check
See what you know: 5 questions on this topic
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More problem types
Water or no water
Use this for “The watered plant is 22 cm, the dry one 8 cm. How much taller?”
How much a plant grew
Use this for “The plant was 18 cm. Now it is 25 cm. How much did it grow?”
A plant’s height week by week
Use this to record a plant’s height each week and see the pattern.
Planning a fair test
Use this for “In a fair test of sunlight, what stays the same for both plants?”