マルハナバチがモールス信号のような光を見分けた！ハチの脳の時間感覚

Words　単語

単語のレベル：CEFR-J（『CEFR-J Wordlist Version 1.6』 東京外国語大学投野由紀夫研究室. （URL: https://www.cefr-j.org/download.html より 2026年8月ダウンロード））

1. Reading Quiz　本文の内容に合うものを選ぼう

1. What did the team build for the bees?

   A. A gardenB. A mazeC. A towerD. A pool

2. What did the other kind of flash lead to?

   A. A bitter liquidB. Sugar waterC. FlowersD. An exit

3. Why did the circles change places in every room?

   A. To make the bees tiredB. To give the bees more sugarC. To make the room brighterD. So the bees could not just remember the place

4. What did most bees do after the sugar was taken away?

   A. They stopped flying.B. They flew to a new color.C. They still flew to the flash that had meant sugar.D. They went to the bitter liquid.

2. True or False　正しければ T、違っていれば F

1. (     ) The circles of light were yellow.

2. (     ) Bees like the bitter liquid.

3. (     ) A bee's brain is bigger than one cubic millimeter.

4. (     ) Pigeons were already known to have this skill.

3. Fill in the Blanks　下の語から選んで空らんをうめよう（形を変えずに）

flashedskillmazebitterdifferencecircles

1. In each room, there were two yellow _____ of light.

2. The team built a _____ for the bees.

3. The other led to a _____ liquid that bees do not like.

4. Bumblebees can learn the _____ between short and long flashes of light.

5. One circle _____ quickly, like a dot in Morse code.

6. Before this study, scientists had seen this _____ only in animals with backbones.

4. Word Order　語を並べかえて正しい文にしよう

1. ( the / maze / The / for / team / bees / a / built ) .

2. ( room / changed / in / places / The / circles / every ) .

3. ( the / away / Later, / the / sugar / took / scientists ) .

5. Think and Write　英語で答えてみよう

1. What other animals do you think can tell short and long sounds or lights apart?（短い・長い音や光を見分けられるほかの動物は何だと思いますか？）

2. Why do you think bees might need a sense of time?（ハチに時間の感覚が必要なのはなぜだと思いますか？）