Grade 2 | SCIENCE
WEEK 13 • STUDENT TEXTBOOK • DAYS 61–65
Read each lesson with a parent or teacher and study the worked example. Then answer the questions for that day in the Week 13 Practice Workbook.
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
A property is something you can observe about a material, such as its color, its texture, its shape or how hard it is. Texture is how something feels: smooth, rough, bumpy or soft.
A solid keeps its own shape. A block stays a block whether you put it in a cup or on a plate. Scientists observe properties carefully and record them so they can sort and compare materials.
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?
- The rock keeps its own shape.
- Materials that keep their own shape are solids.
Worked answer: A solid.
Day 62: Properties of Liquids
A liquid flows. It takes the shape of the container it is in. Pour juice from a tall glass into a flat bowl, and it spreads out to fit the bowl.
Liquids have properties too. Some are thin and flow quickly, like water. Some are thick and flow slowly, like honey. Liquids can also be clear or cloudy, and they come in different colors.
Worked example: Milk is poured from a jug into a cup. What happens to its shape?
- Milk is a liquid.
- A liquid takes the shape of its container.
Worked answer: It takes the shape of the cup.
Day 63: A Fair Test: Which Liquid Flows Fastest?
A fair test changes only one thing. In a liquid race, the only thing that changes is the liquid. The ramp, its tilt, the distance and the amount of liquid all stay the same.
If anything else changed, such as a steeper ramp for one liquid, we could not tell whether the liquid or the ramp made the difference. Record the results in a table so you can compare them.
Worked example: Why must every liquid start with the same amount, such as 1 spoonful?
- A bigger amount might flow faster just because there is more of it.
- Using the same amount keeps the test fair.
Worked answer: So the only difference is the kind of liquid.
Day 64: Sort Materials by Their Properties
Scientists sort materials into groups by their properties. One way to sort is solid or liquid: does it keep its own shape, or does it flow?
When a liquid is inside a closed container, look at what is inside, not the container. A bottle is a solid, but the shampoo in it is a liquid. Tip it gently and watch whether the inside flows.
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?
- The lotion does not keep its own shape when tipped.
- It flows, even though it flows slowly.
Worked answer: A liquid, because it flows when the bottle is tipped.
Day 65: Independent Check: Solids and Liquids
Today you will answer on your own.
Use what you learned this week: properties of solids, properties of liquids, fair tests and sorting by properties.
Worked example: Is a marble a solid or a liquid?
- A marble keeps its own round shape.
- Materials that keep their shape are solids.
Worked answer: A solid.
Week 13 Student Textbook | Week 13 Practice Workbook | Week 13 Teacher Guide | Week 12 Student Textbook | Week 14 Student Textbook | Grade 2 index