Complete the text with suitable verbs. Use the first letter as the clue. Invisible Ink with Lemon Juice Making invisible ink is a lot of fun. You can (1) p _ _ _ _ _ _ you are a secret agent as you keep all your secret codes and messages hidden from others. All you need are several basic household objects and the hidden power of lemon juice. What you'll need: half a lemon cotton bud water white paper spoon lamp or another light bulb bowl Instructions: (2) S _ _ _ _ _ _ lemon juice into the bowl and (3) a _ _ a few drops of water. (4) M _ _ the water and lemon juice with the spoon. (5) D _ _ the cotton bud into the mixture and (6) w _ _ _ _ a message onto the white paper. (7) W _ _ _ for the juiceto dry so it becomes completely invisible. When you are ready to read your secret message or show it to someone else, (8) h _ _ _ the paper by holding it close to a light bulb. What's happening? Lemon juice is an organic substance that oxidizes and (9) t _ _ _ _ brown when heated. Diluting the lemon juice in water makes it very hard to notice when you (10) a _ _ _ _ it on paper, no one will be aware of its presence until it is heated and the secret message is revealed. Other substances which work in the same way include orange juice, honey, inilk, onion juice, and vinegar. Invisible ink can also be made using chemicalreactions or by viewing certain liquids under ultraviolet (UV) light. (Adopted from: http://www.banteerns.ie/downloads/science-experiments-for-kids.pdf (April 27, 2019))

Question

Complete the text with suitable verbs. Use the first letter as the clue.

Invisible Ink with Lemon Juice

Making invisible ink is a lot of fun. You can (1) p _ _ _ _ _ _ you are a secret agent as you keep all your secret codes and messages hidden from others. All you need are several basic household objects and the hidden power of lemon juice.

What you'll need:

half a lemon
cotton bud
water
white paper
spoon
lamp or another light bulb
bowl

Instructions:

(2) S _ _ _ _ _ _ lemon juice into the bowl and (3) a _ _ a few drops of water.
(4) M _ _ the water and lemon juice with the spoon.
(5) D _ _ the cotton bud into the mixture and (6) w _ _ _ _ a message onto the white paper.
(7) W _ _ _ for the juice to dry so it becomes completely invisible.
When you are ready to read your secret message or show it to someone else, (8) h _ _ _ the paper by holding it close to a light bulb.

What's happening?

Lemon juice is an organic substance that oxidizes and (9) t _ _ _ _ brown when heated. Diluting the lemon juice in water makes it very hard to notice when you (10) a _ _ _ _ it on paper, no one will be aware of its presence until it is heated and the secret message is revealed. Other substances which work in the same way include orange juice, honey, inilk, onion juice, and vinegar. Invisible ink can also be made using chemical reactions or by viewing certain liquids under ultraviolet (UV) light.

(Adopted from: http://www.banteerns.ie/downloads/science-experiments-for-kids.pdf (April 27, 2019))