Ahava~Love Assembly

Grade 2 Science Week 13 | Teacher Guide

Grade 2 | SCIENCE

WEEK 13 • TEACHER GUIDE AND ANSWER KEY • DAYS 61–65

Read each lesson aloud with the child and model the worked example before practice. Do not show this key during practice. Accept oral, drawn or written answers where the child cannot yet write the whole answer. On Day 65, read aloud if needed but give no hints.

Week 13 Student Textbook | Week 13 Practice Workbook | Week 13 Teacher Guide | Week 12 Student Textbook | Week 14 Student Textbook | Grade 2 index

Day 61: Properties of Solids

Standard: Grade 2 Science Standard 1, 2.1

Practice record: Observing solids, printed on the Week 13 Practice Workbook.

Worked example: A rock stays the same shape when you move it from a bowl to a box. Is it a solid or a liquid? Worked answer: A solid.

  1. The sandpaper.
  2. The cotton ball and the sponge.
  3. Example: Put the wooden block in a cup, then on a plate, and see that its shape stays the same each time. Accept any test that moves the solid into different containers and observes its shape.

Teaching note: Gather the four solids if you can and let the child feel each one before reading the table.

Day 62: Properties of Liquids

Standard: Grade 2 Science Standard 1, 2.1

Practice record: Observing liquids, printed on the Week 13 Practice Workbook.

Worked example: Milk is poured from a jug into a cup. What happens to its shape? Worked answer: It takes the shape of the cup.

  1. The milk.
  2. The honey and the pancake syrup.
  3. A solid keeps its own shape, but a liquid flows and takes the shape of its container. Example: a block stays a block, but water spreads out to fill a bowl. Accept any answer with a correct example of each.

Teaching note: Pour a little water from a glass into a plate so the child sees it change shape. Wipe up spills right away.

Day 63: A Fair Test: Which Liquid Flows Fastest?

Standard: Grade 2 Science Standard 1, 2.1

Practice record: Sample results, printed on the Week 13 Practice Workbook.

Worked example: Why must every liquid start with the same amount, such as 1 spoonful? Worked answer: So the only difference is the kind of liquid.

  1. Water (2 seconds).
  2. 14 more seconds (16 – 2 = 14).
  3. The thick syrup took the longest and the thin water was fastest, so thicker liquids flow more slowly. Accept any answer that uses the times to link thickness and speed.

Teaching note: Results vary with the ramp and the liquids, but the order is usually water, oil, then syrup. Do this over a towel or outdoors. Use the observation checklist below.

Hands-on task observation checklist (Race liquids down a ramp). Check each item you observe. Four or five items shows the child met the task goal; two or three means repeat the task with support.

  • ☐ Child used the same ramp at the same tilt for every liquid.
  • ☐ Child used the same start and finish lines.
  • ☐ Child used the same amount of each liquid.
  • ☐ Child counted and recorded the time for each liquid.
  • ☐ Child named the fastest and slowest liquids from the data.

Day 64: Sort Materials by Their Properties

Standard: Grade 2 Science Standard 1, 2.1

Practice record: Sample sorting chart, printed on the Week 13 Practice Workbook.

Worked example: A closed bottle of lotion is tipped, and the lotion slides slowly to one side. Is the lotion a solid or a liquid? Worked answer: A liquid, because it flows when the bottle is tipped.

  1. The juice and the shampoo.
  2. It is round and keeps its shape.
  3. The bottle keeps its shape, so the bottle is a solid. But the shampoo inside flows when the bottle is tipped, so the shampoo is a liquid. Accept any answer that separates the container from what is inside.

Teaching note: Use only closed containers so nothing spills. Some materials, like toothpaste, are hard to sort; praise careful observation over a single right answer. Use the observation checklist below.

Hands-on task observation checklist (Sort a mystery bag). Check each item you observe. Four or five items shows the child met the task goal; two or three means repeat the task with support.

  • ☐ Child observed each item before sorting it.
  • ☐ Child tipped the closed containers to check for flow.
  • ☐ Child sorted every item into solid or liquid.
  • ☐ Child recorded a color and a texture or flow for each item.
  • ☐ Child named a property that helped decide the group.

Day 65: Independent Check: Solids and Liquids

Standard: Grade 2 Science Standard 1, 2.1

Practice record: A second liquid race, printed on the Week 13 Practice Workbook.

Worked example: Is a marble a solid or a liquid? Worked answer: A solid.

  1. The ketchup.
  2. Any one of color, texture, shape or hardness.
  3. A fair test changes only the liquid. A steeper ramp would make the ketchup flow faster, so we could not tell whether the time came from the liquid or the ramp. Accept any answer that says the ramp must stay the same.

Teaching note: Independent check: read aloud if needed, but give no hints.

Week 13 Student Textbook | Week 13 Practice Workbook | Week 13 Teacher Guide | Week 12 Student Textbook | Week 14 Student Textbook | Grade 2 index