Cell parts
Which cell part controls the cell?
哪个细胞结构控制细胞的活动？
The nucleus
Name two parts found in both a leaf cell and a cheek cell.
说出叶片细胞和口腔细胞都有的两个结构
Any two: nucleus, cytoplasm, cell membrane.
任意两个：细胞核、细胞质、细胞膜
Why does a root hair cell have a long extension?
为什么根毛细胞有一个长长的突起？
It gives more surface area to absorb water and minerals.
它增大表面积，帮助吸收水和矿物质
What do we call a group of similar cells working together?
一组共同工作的相似细胞叫什么？
A tissue. 组织。
Which state has a fixed shape and a fixed volume?
哪种状态有固定的形状和体积？
Solid. 固体。
Which cell part controls what enters and leaves?
哪个细胞结构控制物质进出细胞？
The cell membrane
细胞膜
A cell has a cell wall and chloroplasts. Is it an animal cell or a plant cell?
一个细胞有细胞壁和叶绿体。它是动物细胞还是植物细胞？
A plant cell. 植物细胞
Why do palisade cells have many chloroplasts?
为什么栅栏细胞有很多叶绿体？
To absorb more light for photosynthesis.
为了吸收更多光，进行光合作用
What do we call different tissues working together to do a job?
不同组织共同完成一项功能，组成什么？
An organ. 器官。
Which state has a fixed volume but takes the shape of its container?
哪种状态有固定的体积，但形状随容器改变？
Liquid. 液体。
Which structure supports a plant cell and keeps its shape? 哪个结构支撑植物细胞并保持其形状？
The cell wall. 细胞壁
What is stored in a plant cell’s large vacuole?
植物细胞的大液泡里储存着什么？
Cell sap, containing water and dissolved substances.
细胞液，含有水和溶解的物质
What do red blood cells transport around the body?
红细胞在身体中运输什么？
Oxygen. 氧气
Put these in order from smallest to largest: organ, cell, tissue.
把这些从小到大排列：器官、细胞、组织。
Cell → tissue → organ.
细胞 → 组织 → 器官。
In which state are particles far apart?
哪种状态的粒子相距很远？
Gas. 气体。
Which cell part carries out photosynthesis?
哪个细胞结构进行光合作用？
The chloroplast. 叶绿体
Why do most underground root cells have no chloroplasts?
为什么大多数地下根细胞没有叶绿体？
They receive little or no light, so they do not photosynthesise.
它们接收不到或只能接收到很少的光，因此不进行光合作用
How do white blood cells help the body?
白细胞怎样帮助身体？
They fight infection.
它们帮助抵抗感染
Why do we need a microscope to see most cells clearly?
为什么我们需要显微镜才能看清大多数细胞？
They are too small to see clearly with our eyes.
它们太小，肉眼无法看清。
Which is easier to compress: air or water?
空气和水，哪个更容易被压缩？
Air. 空气。
Where do most chemical reactions happen in a cell?
细胞中的大多数化学反应发生在哪里？
In the cytoplasm. 在细胞质中
How does a full large vacuole help a plant cell?
充满细胞液的大液泡怎样帮助植物细胞？
It creates pressure against the cell wall, keeping the cell firm.
它对细胞壁产生压力，使细胞保持坚挺
How does a nerve cell’s long shape help it?
神经细胞长长的形状有什么作用？
It helps carry signals over long distances.
它帮助远距离传递信号
The eyepiece is 10× and the objective lens is 4×. What is the total magnification?
目镜是10倍，物镜是4倍。总放大倍数是多少？
10 × 4 = 40×.
10 × 4 = 40倍。
Water’s temperature rises. How does its particle movement change?
水的温度升高时，粒子的运动怎样变化？
The particles move faster.
粒子运动得更快。