Year 1: Solid shapes with curved parts: sphere, cone and cylinder
Part of the Year 1 2-d and 3-d shapes chapter. Chapter overview · whole chapter on one page · Download worksheet (PDF) · Answers (PDF)
Solid shapes with curved parts: sphere, cone and cylinder
Some solid shapes have curved parts. A sphere is round like a ball. It has no flat faces at all. A cone has a point at the top and one flat round face at the bottom. A cylinder has two flat round faces, a top and a bottom, and a curved side. A tin of beans is a cylinder.
Key ideas
- A sphere is round all over. It has no flat faces.
- A cone has a point at the top and one flat round face.
- A cylinder has 2 flat round faces and a curved side.
- Curved means smooth and round, not flat.
Key words. A flat shape is 2-D. A solid shape is 3-D, so it has depth.
Method. Look at the shape, then match its facts to a name.
- Look at the shape. Is it flat, or is it solid? Flat shapes are 2-D. Solid shapes are 3-D.It is a solid (3-D) shape.
- Read its facts. Each name has its own facts. Count the sides, corners or faces.It is round like a ball. It has no flat faces and no corners.
- Find the name that matches. Only one shape name has these facts.sphere
Check. Say the name out loud. Does it fit the facts? ✓
Watch out. Count the sides or faces before you say the name.
Method. Check the curved side of each shape, then pick the one that matches.
- Check each shape. Look at the curved side of each shape.cube: no, cone: yes, pyramid: no
- Find the one that matches. Only one shape has curved side yes.cone matches.
- Write the answer. cone
Check. Read the facts for cone again. ✓
Watch out. Check every shape, not just the first one you see.
Method. Count the flat faces one at a time.
- Look at the cylinder. Find each one of the flat faces.1, 2
- Count them all. The last number tells you how many there are.2 flat faces
- Write the answer. 2
Check. Count again from the other side. You get 2 again. ✓
Watch out. Touch each one as you count it, so you do not miss one or count one twice. Some faces are on the back or underneath. Turn the real shape to count them all.
Watch out
Watch out: a cone and a pyramid both have a point at the top. A cone has a round flat base. A pyramid has a square base, and its sides are flat.
Exam tip
Grown-up tip. Put a ball, a tin and a paper cone on a table. Ask: “Which one rolls? Which one stands up on its flat bottom?” Let your child find the curved parts with their fingers.
Exercise 3D Spheres, cones and cylinders
Non-calculatorKey words. A flat shape is 2-D. A solid shape is 3-D, so it has depth.
Method. Look at the shape, then match its facts to a name.
- Look at the shape. Is it flat, or is it solid? Flat shapes are 2-D. Solid shapes are 3-D.It is a solid (3-D) shape.
- Read its facts. Each name has its own facts. Count the sides, corners or faces.It is round like a ball. It has no flat faces and no corners.
- Find the name that matches. Only one shape name has these facts.sphere
Check. Say the name out loud. Does it fit the facts? ✓
Watch out. Count the sides or faces before you say the name.
Key words. A flat shape is 2-D. A solid shape is 3-D, so it has depth.
Method. Look at the shape, then match its facts to a name.
- Look at the shape. Is it flat, or is it solid? Flat shapes are 2-D. Solid shapes are 3-D.It is a solid (3-D) shape.
- Read its facts. Each name has its own facts. Count the sides, corners or faces.It has a point at the top, one flat round face at the bottom, and a curved side.
- Find the name that matches. Only one shape name has these facts.cone
Check. Say the name out loud. Does it fit the facts? ✓
Watch out. Count the sides or faces before you say the name.
Key words. A flat shape is 2-D. A solid shape is 3-D, so it has depth.
Method. Look at the shape, then match its facts to a name.
- Look at the shape. Is it flat, or is it solid? Flat shapes are 2-D. Solid shapes are 3-D.It is a solid (3-D) shape.
- Read its facts. Each name has its own facts. Count the sides, corners or faces.It has 2 flat round faces, a top and a bottom, and a curved side.
- Find the name that matches. Only one shape name has these facts.cylinder
Check. Say the name out loud. Does it fit the facts? ✓
Watch out. Count the sides or faces before you say the name.
Method. Check the flat faces of each shape, then pick the one that matches.
- Check each shape. Look at the flat faces of each shape.sphere: 0, cylinder: 2, cone: 1
- Find the one that matches. Only one shape has flat faces 2.cylinder matches.
- Write the answer. cylinder
Check. Read the facts for cylinder again. ✓
Watch out. Check every shape, not just the first one you see.
Method. Count the flat faces one at a time.
- Look at the cone. Find each one of the flat faces.1
- Count them all. The last number tells you how many there are.1 flat faces
- Write the answer. 1
Check. Count again from the other side. You get 1 again. ✓
Watch out. Touch each one as you count it, so you do not miss one or count one twice. Some faces are on the back or underneath. Turn the real shape to count them all.
Method. Check the flat faces of each shape, then pick the one that matches.
- Check each shape. Look at the flat faces of each shape.cube: 6, sphere: 0, cone: 1
- Find the one that matches. Only one shape has flat faces 0.sphere matches.
- Write the answer. sphere
Check. Read the facts for sphere again. ✓
Watch out. Check every shape, not just the first one you see.
Method. Check the flat faces of each shape, then pick the one that matches.
- Check each shape. Look at the flat faces of each shape.pyramid: 5, cone: 1, cube: 6
- Find the one that matches. Only one shape has flat faces 1.cone matches.
- Write the answer. cone
Check. Read the facts for cone again. ✓
Watch out. Check every shape, not just the first one you see.
Method. Check the curved parts of each shape, then pick the one that matches.
- Check each shape. Look at the curved parts of each shape.sphere: yes, cylinder: yes, cube: no
- Find the one that matches. Only one shape has curved parts no.cube matches.
- Write the answer. cube
Check. Read the facts for cube again. ✓
Watch out. Check every shape, not just the first one you see.
Method. Think about each shape and how it moves.
- Think about the ball. A ball is a sphere. It is round all over.ball = sphere, round all over
- Think about the tin. A tin is a cylinder. It rolls only along its side.tin = cylinder, rolls in a line
- Decide which rolls in every direction. Only a round ball rolls in every direction.sphere
Check. Roll a ball and a tin on a table to check. ✓
Watch out. A tin does not roll in every direction.
Method. Count the flat faces of a cone, then compare with the number given.
- Count the flat faces. Count each one once.A cone has 1 flat face.
- Compare with 2. Is the number the same?2 and 1 are not the same.
- Write the answer. No. A cone has 1 flat face.
Check. Count again to check: 1. ✓
Watch out. Count every one, including any on the back or underneath.
Method. Look for a curved part on each shape.
- Look at the sphere. Check for curved parts.It is round like a ball. It has no flat faces and no corners.
- Look at the cylinder. Check for curved parts.It has 2 flat round faces, a top and a bottom, and a curved side.
- Decide. Both have a curved part, so the answer is yes.Yes. Both have curved parts.
Check. Point to the curved part on each shape. ✓
Watch out. A flat face is not curved. Look for the part that is round.