You investigate how the rate of a reaction was affected by temperature. What is the independent variable? 您研究温度如何影响反应速率。 自变量是什么？
Rate of reaction.反应速率。
Temperature.温度。
Explain what the melting point is.解释熔点是多少。
own answer
Explain the boiling point. 解释沸点。
own answer
You investigate the amount of energy stored in different brands of crisps. What is the dependent variable? 您调查了不同品牌的薯片中储存的能量。 什么是因变量？
Brand of crisp.品牌脆。
Amount of energy stored 储存的能量量。
What is a variable?
A type of experiment.一种实验。
A factor that impacts an investigation.影响调查的因素。
When things reach boiling point, they change from a liquid to a...当物质达到沸点时，它们会从液体变成...
gas.气。
solid.固体。
Is coffee a solution? 咖啡是化学溶液吗？
No
Yes
Which of these dissolve in water?其中哪些溶于水？
sand. 沙
oil. 油。
Salt. 盐
Water freezes at which temperature? 水在什么温度下会结冰？
0 F
0 C
You investigate how the intensity of light affects the size of leaves on a tree. Which is the Independent variable? 您研究光的强度如何影响树上叶子的大小。 哪个是自变量？
size of leaves.叶子的大小
light intensity.光强度。
You investigate whether the height of a person affects how fast they can run. What is the independent variable? 您调查一个人的身高是否会影响他们的跑步速度。 自变量是什么？
How fast they can run.他们能跑多快。
Height of the person.人的身高。
How do you water is very hot just by looking at it?你怎么看水就很热？
Bubbles and steam. 气泡和蒸汽。
The water level drops. 水位下降。
What does soluble mean? 可溶是什么意思？
A substance dissolves well.物质溶解良好。
A substance doesn't dissolve.物质不溶解。
You investigate whether the height a ball bounces depends on the ball's size. What is the independent variable? 您研究球弹跳的高度是否取决于球的大小。 自变量是什么？
Height of the bounce.弹跳的高度。
Size of the ball. 球的大小。
The boiling point of water (at sea level) is...水的沸点（在海平面上）是......
100 F
100 C
When water vapour gets cold it... 当水蒸气变冷时...
condenses into liquid. 凝结成液体。
evaporates.蒸发。
Which substance is liquid at 25 degrees C?哪种物质在 25 摄氏度时是液体？
Diesel 柴油
Candle wax 蜡烛蜡
What is an independent variable? 什么是自变量？
The thing that we change.我们改变的事情。
The thing that we measure.我们改变的事情。
What is a solution? 什么是制造化学溶液
The answer to a problem. 问题的答案。
A liquid with a dissolved solid in it. 含有溶解固体的液体。
What is a control variable? 什么是控制变量？
The things we measure.我们测量的东西。
The things we keep the same.我们保留的东西是一样的。
The things we change.我们改变的事情。
A solution is saturated when... 溶液饱和时...
When it becomes a gas. 当它变成气体时。
It can't dissolve any more solids. 它不能再溶解任何固体。
What does insoluble mean? 不溶是什么意思？
A substance which doesn't dissolve.不溶解的物质。
A substance which dissolves.一种可溶解的物质。
You investigate the amount of energy stored in different brands of crisps. What is the independent variable? 您调查了不同品牌的薯片中储存的能量。 自变量是什么？
The brand of crisp 品牌脆。
The amount of energy stored.储存的能量。
Every liquid has its own boiling/melting point.每种液体都有自己的沸点/熔点。
False.
True.
Each different liquid has its own freezing point.每种不同的液体都有自己的冰点。
True
False
When water vapour cools it.... 当水蒸气冷却后......
forms clouds.形成云
makes snowflakes. 制作雪花
When water freezes it increases in size. 当水结冰时，它的大小会增加。
True
False
You investigate which colour flower attracts the most bees. What is the dependent variable? 您调查哪种颜色的花最吸引蜜蜂。 什么是因变量？
Number of bees. 蜜蜂数量。
Colour of flower. 花的颜色。
When water is heated by the sun it... 当水被太阳加热时...
condenses. 凝结。
evaporates. 蒸发。
Name 2 common solutions. 说出 2 个常见的化学溶液.
Own answers.
Which substance is solid at 25 degrees C? 哪种物质在 25 摄氏度时是固体？
Water
Chocolate
Name 4 things that can melt.说出 4 种可以融化的东西。
ice. wax. plastic. chocolate. metal. butter. ice cream...
Name 2 solids that you can make crystals from. 说出两种可以制造晶体的固体
own answer
Rain is formed when water vapour... 雨是水蒸气形成的...
condenses into liquid.凝结成液体。
evaporates to become cloud. 蒸发成云。
If a substance dissolves well in water, it is... 如果一种物质能很好地溶于水，那么它...
insoluble.溶。
soluble. 可溶。
You investigate whether the height of a person affects how fast they can run. What is the dependent variable? 您调查一个人的身高是否会影响他们的跑步速度。 什么是因变量？
How fast they can run.他们能跑多快。
Height of the person 人的身高。
Name 3 substances that dissolve in water. 说出 3 种溶于水的物质。
Own answers.
What is the water cycle? 什么是水循环？
A cycle powered by water. 一个由水驱动的循环。
A cycle you can ride on water. 您可以在水上骑行的自行车。
How the Earth recycles water 地球如何循环利用水。
What do we measure temperature with?我们用什么来测量温度？
Pedometer. 计步器。
Thermometer. 温度计。
You investigate how the rate of a reaction was affected by temperature. What is the dependent variable? 您研究温度如何影响反应速率。 什么是因变量？
Temperature.温度。
Rate of reaction. 反应速率。
You investigate how the intensity of light affects the size of leaves on a tree. Which is the dependent variable?您研究光的强度如何影响树上叶子的大小。 哪个是因变量？
size of the leaves 叶子的大小
light intensity.光强度。
You investigate whether the height a ball bounces depends on the balls's size. What is the dependent variable? 您研究球弹跳的高度是否取决于球的大小。 什么是因变量？
Height of the bounce.弹跳的高度。
Size of the ball.球的大小。
On the highest mountain in the world, water boils at 71 degrees C.在世界上最高的山上，水的沸点为71摄氏度。
True
False
When a solid becomes a liquid it is called...当固体变成液体时，它被称为......
The freezing point.冰点。
The boiling point.沸点。
The melting point .熔点。
What is a dependent variable?什么是因变量？
The variable we change.我们改变的变量。
The variable we measure.我们测量的东西。
The temperature at which a liquid boils is called its...液体沸腾的温度称为...
Freezing point.冰点。
Melting point.熔点。
Boiling point.沸点。
Which substance would have to be cooled to -220 degrees to make it a liquid?哪种物质必须冷却到 -220 度才能变成液体？
Oxygen.氧。
Iron 铁
The scientific name for steam is...蒸汽的学名是...
spray.喷。
water vapour.水蒸气。
You investigate which colour flower attracts the most bees. What is the independent variable? 您调查哪种颜色的花最吸引蜜蜂。 自变量是什么？
Number of bees.蜜蜂数量。
Colour of the flower 花的颜色。
When a liquid evaporates from a solution, what is left behind?当液体从溶液中蒸发时，留下什么？
a gas.一种气体。
a solid. 一个固体。