Sequence: steps in order

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Making toast: 1. Put bread in toaster 2. Push the lever down 3. Spread butter. Is this order correct for a sequence?

A Yes, each step comes in an order that works

B No, butter must go on before the bread is toasted

2. Which sequence for brushing teeth works?

A Put toothpaste on brush, brush teeth, rinse mouth

B Rinse mouth, brush teeth, put toothpaste on brush

3. True or false: In a sequence, you can swap the steps around and always get the same result.

A True

B False

4. A robot has these steps: 1. Move forward 2. Turn left 3. Pick up the ball. The robot is meant to pick up the ball it is standing next to, but the robot never grabs it. What is the problem?

A A step is missing: the robot needs to pick up the ball

B The steps are not numbered

5. Sequence for making a sandwich: 1. Get two slices of bread 2. Add cheese 3. Close the sandwich. What is wrong with this sequence?

A The sequence has too many steps

B A step is missing: nothing says to put the bread on a plate or board first

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
11. Fill the kettle 2. Boil the water 3. Pour the water		A1. Wash hands 2. Dry hands 3. Make a sandwich
21. Put on shoes 2. Put on socks		BThere is an extra step. Clapping three times is not needed and does not help the sequence.
3A missing step can stop the result from working		C1. Open the app 2. Press Send
4Putting steps in the right order gives the correct result		DA sequence: steps run one after another in a set order
51. Drink the juice 2. Pour the juice 3. Get a cup		EThe steps are in the wrong order. You must get a cup and pour the juice before you can drink it.
61. Turn on the computer 2. Clap three times 3. Open the game		FThe order is wrong, so the result changes (shoes over socks)

Definitions

sequence

Fill in the Blanks

Complete each line of code by filling in the missing parts.

1. Put on socks _. Put on shoes 3. Tie the laces

x ← 5 x ← x + 2 OUTPUT _

x ← 2 x ← x _ 3 OUTPUT x

x ← 3 x ← x + 4 ______ x

x ← 1 x ← x + 1 x _ x + 1

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A 1. Get two slices of bread

B 2. Spread butter on the toast

C 3. Press the lever down

D 4. Wait for toast to pop up

E 5. Spread butter on the toast

Question 2

A 1. Wet the toothbrush

B 2. Put toothpaste on it

C 3. Brush for two minutes

D 4. Put toothpaste on it

E 5. Rinse the toothbrush

Question 3

A SET score TO 0

B ADD 5 TO score

C SET score TO 0

D SHOW score

Question 4

A 1. Water the soil

B 2. Drop in the seed

C 3. Cover it with soil

D 4. Water the soil

Question 5

A 1. Lay out two bread slices

B 2. Spread butter on the bread

C 3. Eat the sandwich

D 4. Press the slices together

Answer Key

Sequence: steps in order

Section A: Quick Questions

A — Yes, each step comes in an order that works

A — Put toothpaste on brush, brush teeth, rinse mouth

B — False

A — A step is missing: the robot needs to pick up the ball

B — A step is missing: nothing says to put the bread on a plate or board first

Section B: Match the Pairs

1. Fill the kettle 2. Boil the water 3. Pour the water → A sequence: steps run one after another in a set order

1. Put on shoes 2. Put on socks → The order is wrong, so the result changes (shoes over socks)

A missing step can stop the result from working → 1. Open the app 2. Press Send

Putting steps in the right order gives the correct result → 1. Wash hands 2. Dry hands 3. Make a sandwich

1. Drink the juice 2. Pour the juice 3. Get a cup → The steps are in the wrong order. You must get a cup and pour the juice before you can drink it.

1. Turn on the computer 2. Clap three times 3. Open the game → There is an extra step. Clapping three times is not needed and does not help the sequence.

Section C: Definitions

sequence — Steps that run one after another in a set order. Changing the order, leaving a step out or adding an extra step can change the result.

Section D: Fill in the Blanks

1. Put on socks
2. Put on shoes
3. Tie the laces

x ← 5
x ← x + 2
OUTPUT x

x ← 2
x ← x * 3
OUTPUT x

x ← 3
x ← x + 4
OUTPUT x

x ← 1
x ← x + 1
x ← x + 1

Section E: Spot the Error

B — The steps are in the wrong order. The butter is spread before the bread is toasted. Line 2 should be 'Put bread in the toaster'.

D — This is an extra step. The toothpaste was already added in step 2, so adding it again after brushing is not needed. Line 4 should be 'Spit into the sink'.

C — This extra step resets the score to 0 and wipes out the 5 points already added. The program would show 0 instead of 8. Line 3 should be 'ADD 3 TO score'.

A — The order is wrong. You cannot water the soil in a hole that has not been dug yet. Line 1 should be 'Dig a small hole'.

C — The sandwich is eaten too early, before the cheese is added and the slices are pressed together. Line 3 should be 'Add cheese to one slice'.