Students will:
1. Recognize and describe characteristics of liquids:
· recognize and describe liquid flow
· describe the shape of drops
· describe the surface of calm water.
2. Compare water with one or more other liquids, such as cooking oil, glycerine or water mixed with liquid detergent. Comparisons may be based on characteristics, such as colour, ease of flow, tendency of drops to form a ball shape (bead), interactions with other liquids and interactions with solid materials.
3. Compare the amount of liquid absorbed by different materials; e.g., students should recognize that some forms of paper are very absorbent but other forms of paper are not.
4. Evaluate the suitability of different materials for containing liquids. Students should recognize that materials such as writing paper and unglazed pottery are not waterproof and would not be suitable as containers; but that waxed paper and glazed pottery are waterproof and, thus, could be used in constructing or lining a liquid container.
5. Demonstrate an understanding that liquid water can be changed to other states:
· recognize that on cooling, liquid water freezes into ice and that on heating, it melts back into liquid water with
properties the same as before
· recognize that on heating, liquid water may be changed into steam or water vapor and that this change can be reversed on cooling
· identify examples in which water is changed from one form to another.
6. Predict that the water level in open containers will decrease due to evaporation, but the water level in closed containers will not decrease.
7. Predict that a wet surface will dry more quickly when exposed to wind or heating and apply this understanding to practical
situations, such as drying of paints, clothes and hair.
8. Recognize that water is a component of many materials and of living things.
9. Recognize human responsibilities for maintaining clean supplies of water, and identify actions that are taken to ensure that
water supplies are safe.
Students will:
1. Describe, classify and order materials on the basis of their buoyancy. Students who have achieved this expectation will distinguish between materials that sink in water and those that float. They will also be aware that some “floaters” sit mostly above water, while others sit mostly below water. The terms buoyancy and density may be introduced but are not
required as part of this learning expectation.
2. Alter or add to a floating object so that it will sink, and alter or add to a nonfloating object so that it will float.
3. Assemble materials so they will float, carry a load and be stable in water.
4. Modify a watercraft to increase the load it will carry.
5. Modify a watercraft to increase its stability in water.
6. Evaluate the appropriateness of various materials to the construction of watercraft, in particular:
· the degree to which the material is waterproof (not porous)
· the ability to form waterproof joints between parts
· the stiffness or rigidity of the material
· the buoyancy of the material.
7. Develop or adapt methods of construction that are appropriate to the design task.
8. Adapt the design of a watercraft so it can be propelled through water.
9. Explain why a given material, design or component is appropriate to the design task.
