FINAL SUMMATIVE ASSESSMENT SUMMARY GRADE 3.pdf

FINAL SUMMATIVE ASSESSMENT SUMMARY SCIENCE – GRADE 3 ACADEMIC YEAR 2023 - 2024 THEME 5 Light and Shadow A shadow is formed because light trav...

FINAL SUMMATIVE ASSESSMENT SUMMARY SCIENCE – GRADE 3 ACADEMIC YEAR 2023 - 2024 THEME 5 Light and Shadow A shadow is formed because light travels only in straight lines. When the path is blocked, a shadow is formed. Based on the picture beside, we can conclude that the clear glass is transparent material because it does not form any shadow when we block the light sources. Meanwhile the box is opaque because it forms shadow (dark area) behind the object when we block the light sources. Identify the size of shadow according to the position of the object. The size, length, and position of a shadow can change? Look the picture below. picture 1 picture 2 picture 3 Based on the picture above, we can see that if we move the object from the light sources, it will change the size of the shadow. In picture 1, when we move the object closer to the light sources, the size of the shadow on the screen became larger. In picture number 2, the object further from the light source cerate small shadow. Meanwhile, in picture 3, when the light source gets closer to the object, it creates big shadows. The changing position of light sources also affects the length and position of shadow. Classify materials in terms of transparency TRANSPARENT TRANSLUCENT OPAQUE Transparent Translucent Opaque Transparent object Translucent object Opaque object does allows most of the light only allows some light not allow any light to to pass through it. This to pass through it. This pass through it. This means that we can means that we can means that we clearly see through it. partially see through cannot clearly see it. through it at all. Resources : Cambridge Primary Science, Learner’s Book 3 Unit 3, page 64 – 90. Portfolio 1 – 4 Theme 5 PowerPoint Theme 5 THEME 6 The Earth and The Moon Earth is spherical like a ball. The Earth and the Moon are both rocky objects with a crust of solid rocky. The Moon is a natural satellite of the Earth. The Moon takes 29 days to orbit the Earth. The Moon has many craters. Craters are made when space rocks hit the Moon’s surface. The Sun is a star in the centre of our Solar System. The Sun is made of very hot gases. The Sun is the source of light for the Earth and the moon. Every object with mass has gravity. An object’s gravity pulls everything towards the centre of the object. The Moon Phases Every night the moon changes. It follows a pattern that repeats each month. Every day, moon appears, it changes the shape. We call the pattern of changes in the moon’s appearance moon phases. When the moon is getting bigger, we say the Moon is waxing. When the moon is getting smaller, we say the Moon is waning. Gibbous Moon When the Moon is further away from the Sun than Earth, we see lots of the light side and only a little of dark side. Crescent Moon When the Moon is closer from the Sun than Earth, we see only a little of the light side and lots of dark side. First quarter Moon  When the Moon is the same distance away from the Sun than Earth, we see half of each side. The phases of the Moon look different from the northern and southern hemispheres. Resources : Cambridge Primary Science, Learner’s Book 3 Unit 6, page 154 – 175. Portfolio 5 – 8 Theme 6 PowerPoint Theme 6 THEME 7 Mixture and Filtration States of Matter A matter has a definite mass. It can be soluble or insoluble in water. Different things are made using one or more forms of matter. Solid ▪ Solids have a specific weight, mass and definite shape. ▪ Solids are visible and can be held. Liquid ▪ Liquid takes the shape of the container in which it is poured. ▪ Liquid does not have a fixed shape but has a fixed volume. Gas ▪ A gas does not have a specific shape and can flow freely in all directions Mixture A mixture is when two or more substances are physically but not chemically combined and can be separated again. Flour Paper Rice and and clip and Steel Nails Sand and Iron Steel Brass Dissolve Nails Nails When a solid dissolves in a transparent liquid the liquid, stays transparent but might change colour.  Filtering Filtration is a process by which a substance becomes more clean, or pure. If you make coffee by pouring hot water over grounds and letting the liquid pass through a coffee filter, you are using filtration. Tools we use to separate mixtures sieve magnet funnel & filter forceps Soluble and Insoluble Soluble means solid that dissolve in a liquid. Solids that do not dissolve in a liquid known as insoluble Resources : Cambridge Primary Science, Learner’s Book 3 Unit 2, page 40 – 57. Portfolio 1– 4 Theme 7 Power Point Theme 7 Theme 8 Force and Magnet Force is the push and pull that create motion (movement). Force is used to make things move, change direction, or change the shape. Pull Effect of forces Push Make things start moving, go Change the direction of Change the faster, slow down and stop. moving things. shape of things. When we push the trolly, it will When we hit a moving When we press a start moving. baseball, its direction piece of dough, changes. its shape If we push it harder it will go changes. faster. When we hold back/pull a Measuring force moving trolly, it will slow down and Onestop. way to measure the size of force is by using forcemeter. Forces is measured by the unit newton (N). Based on the pictures, we can conclude that brick has the greatest force (25 N), followed by then the shoe (18 N), and toy car (8 N), which has the smallest forces. Friction Friction is the force that opposes or goes against motion when two surfaces are in contact. It makes moving things slow down and stop. Motion The movement from one From this picture, we place to another is can conclude that created by force (push). force (push) makes motion (the coin move). While friction makes the Friction coin slow down and How type of surface affect Opposite friction direction of stop. motion. The type of surface affects how much friction there is. Friction is usually greater when something moves on a rough surface than on a smooth surface. If two cars move with the same amount of force, car A on a smooth road, and car B on a rocky road. We can conclude that car A will go further and faster because the surface is smooth. Meanwhile, car B is slower because a rough road has bigger friction. Benefits of friction ▪ It enables us to hold on to things and walk without slipping ▪ It enables us to slow down and stop moving vehicles ▪ It enables us to produce heat to keep warm or start a fire Problems that are caused by friction: It causes wear and tear, like we will slip easily if we wear shoes with worn-out soles. It causes unwanted heat to be produce. For example: the moving parts of the machines can become too hot and damage the machines. It causes things to slow down. Friction between the eraser Worn out solace and the surface of the paper Friction between the cause the eraser to wear off train wheels and train and become smaller. track makes the train go slow down. We can reduce the unwanted effects of friction by: Applying oil to bicycle chains reduces The wheels on rollerblades reduce friction and makes pedaling smooth. friction and allow us to go faster. Relation between force and friction This girl uses a force meter to pull a block across a rough carpet. She finds that she needs 8N of force to make the block start moving. It means she will not be able to move the block if she pulls it with a force less than 8N. She repeats her experiment on a smooth floor and the force needed to make the block moving is less than 8N because the friction decreases. Magnet Attract VS Repel When two different sides of magnets meet, they will attract each other. When the same sides of the magnets meet, they will repel (push each other) Attract Resources : Cambridge Primary Science, Learner’s Book 3 Unit 5, page 125 – 153. Portfolio 5– 8 Theme 8 Power Point Theme 8