Grade 2 | SCIENCE
WEEK 14 • PRACTICE WORKBOOK • DAYS 66–70
Read the matching lesson in the Week 14 Student Textbook first. Write each answer on the line below its question. Day 70 is answered on your own.
Fillable Practice PDF: Open or download Week 14 fillable workbook. Type answers in the labeled fields, then save a copy. Drawings may be completed on the printed page.
Week 14 Student Textbook | Week 14 Practice Workbook | Week 14 Teacher Guide | Week 13 Student Textbook | Grade 2 index
Day 66: Testing Strength
Sample results
| Bridge | Pennies it held |
|---|---|
| Flat paper | 3 |
| Folded paper | 28 |
| Card stock | 12 |
- In the sample results, which bridge held the most pennies?
Answer: _________________________________________________
- How many more pennies did the folded paper hold than the flat paper?
Answer: _________________________________________________
- The flat paper and the folded paper were the same kind of paper. Explain what the results show about shape and strength.
Answer: _________________________________________________
_____________________________________________
Hands-on task: Test the strength of paper bridges
- Set two stacks of books 6 inches apart.
- Lay a flat sheet of paper across the gap. Add pennies one at a time to the middle until the bridge sags to the table. Record the number.
- Fold a new sheet of the same paper back and forth like a fan. Lay it across the same gap and test it the same way.
- Test a sheet of card stock the same way.
- Record your results in the table below.
| Bridge | Pennies it held |
|---|---|
| Flat paper | ____ |
| Folded paper | ____ |
| Card stock | ____ |
The strongest bridge was:
_________________________________________________
_____________________________________________
Day 67: Testing Absorbency
Sample results
| Material | Water soaked up after 1 minute |
|---|---|
| Paper towel | All |
| Cloth | All |
| Plastic wrap | None |
| Foil | None |
- Which materials in the sample results soaked up all the water?
Answer: _________________________________________________
- Which materials soaked up none?
Answer: _________________________________________________
- A family needs a cover to keep rain off a woodpile. Use the results to choose a material and explain why.
Answer: _________________________________________________
_____________________________________________
Hands-on task: Test which materials soak up water
- Cut a square of paper towel, cloth, plastic wrap and aluminum foil, each the same size.
- Lay each square on a plate.
- Drip 10 drops of water onto the middle of each square.
- Wait one minute. Tilt each plate and see how much water runs off.
- Record what you observe in the table below.
| Material | Soaked up all, some or none? |
|---|---|
| Paper towel | ____ |
| Cloth | ____ |
| Plastic wrap | ____ |
| Foil | ____ |
The material that soaked up the most water was:
_________________________________________________
_____________________________________________
Day 68: Flexibility, Hardness and Texture
Materials and their properties
| Material | Flexible or stiff | Hard or soft | Texture |
|---|---|---|---|
| Rubber | Flexible | Soft | Grippy |
| Steel | Stiff | Hard | Smooth |
| Wool | Flexible | Soft | Fuzzy |
| Glass | Stiff | Hard | Smooth |
- Which materials in the table are flexible?
Answer: _________________________________________________
- Which material is soft and fuzzy?
Answer: _________________________________________________
- Use the table to choose a material for the bottom of a boot that should not slip. Explain your choice.
Answer: _________________________________________________
_____________________________________________
Day 69: Choose the Best Material for the Job
Sample results
| Material | Water in the cup? | Bent to fit? |
|---|---|---|
| Paper towel | Yes | Yes |
| Cloth | Yes | Yes |
| Plastic bag | No | Yes |
| Foil | No | Yes, but it tore |
- In the sample results, which materials let water into the cup?
Answer: _________________________________________________
- Which materials kept the cup dry?
Answer: _________________________________________________
- Use both columns of the sample results to choose the best material for a rain hat. Explain why it is better than the other dry material.
Answer: _________________________________________________
_____________________________________________
Hands-on task: Choose a material for a rain hat
- Cut squares of paper towel, cloth, plastic bag and aluminum foil, each the same size.
- Stretch one square over a cup and hold it with a rubber band. Do the same for each material.
- Spray each cover with the same number of sprays of water from a spray bottle.
- Remove each cover and look for water inside the cup.
- Record your results, then choose the best material for a rain hat.
| Material | Water in the cup? (yes or no) | Did it bend to fit? |
|---|---|---|
| Paper towel | ____ | ____ |
| Cloth | ____ | ____ |
| Plastic bag | ____ | ____ |
| Foil | ____ | ____ |
My rain hat should be made of:
_________________________________________________
_____________________________________________
Day 70: Independent Check: Testing Materials
Testing three mats
| Mat | Water soaked up | Bends to fit the floor |
|---|---|---|
| Rubber | None | Yes |
| Cotton | All | Yes |
| Wood | Some | No |
Answer on your own. An adult may read the questions aloud but should not give the answers.
- Which mat soaked up all the water?
Answer: _________________________________________________
- Which mat does not bend to fit the floor?
Answer: _________________________________________________
- A family wants a mat by the sink that soaks up drips and fits the floor. Use the table to choose a mat and explain why.
Answer: _________________________________________________
_____________________________________________
Week 14 Student Textbook | Week 14 Practice Workbook | Week 14 Teacher Guide | Week 13 Student Textbook | Grade 2 index
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