资源简介

(共34张PPT)
Gravity-科学融合课
跨学科教学英语
教材内容分析
课程探究逻辑：
通过实验数据归纳科学规律
“What will happen to the dog and the ball ”
“Why do they fall to the ground ”
（感性认知）
（理性知识）
实验汇报将数据与语言结合
生活场景：作业设计中的
“If Gravity Suddenly Disappeared”
天体重力：
（迁移与拓展）
学情分析（7年级）
学生已经掌握了“力”的基本概念，比如推力、拉力，但对“重力”这种“非接触力”理解起来有难度，很容易混淆“质量”和“重量”这两个概念；
知识基础
学生能理解“force”“mass”等简单科学术语，但像“gravity is a force pulling to Earth’s center”这样的专业表达，还需要重点强化；
语言能力
7年级学生处于具体运算阶段，抽象思维能力还在发展，适合通过实验操作，比如测量物体重量，或者PPT演示等可视化工具来理解抽象概念。
认知特点
教学目标
学生通过阅读文本，能用英语准确表述“gravity”“weight”“mass”等核心词汇及其定义，理解重力是将物体拉向地球中心的力。
知识目标
01
学生能通过观察图片和实验数据归纳重力的作用规律，通过实验测量质量并用公式计算物体重量，用英语完成“Weight vs. Mass”对比表格。
能力目标
02
通过用英语学习科学，激发学生对天体物理现象的探究兴趣，培养语言应用与科学思维的融合能力。
情感目标
03
教学方法
设计“质量-重量测量”等实操活动，让学生在动手过程中理解概念。
实验教学法
利用PPT演示重力作用，比如羽毛与保龄球下落的实验，帮助学生直观感受。
多媒体辅助法
布置任务单，比如公式计算、表格填写，强化学生的应用能力。
任务型教学法
Gravity & Weight
Look and think.
What will happen to the dog and the ball
A. Fall to the ground
B. Fly into outer space
Think and answer.
Why do they fall to the ground
Because of gravity.
What is gravity
Gravity is a force that pulls everything toward the center of the Earth.
what
who
unit
cause
force
Newton
newton (N)
weight
Because of the gravity of the Earth, we have weight.
Differences
Weight = 600N
G
Name Characters
Gravity +
Weight
Direction
Value
Value
=600N
So the weight is the v______ of the gravity.
alue
Let’s weigh something.
Object Mass(g) Weight(N)
Its mass is ____ g, and its weight is _____ N.
10
1
2
3
4
20
20
50
0.1
0.2
0.2
0.5
= ×
W = m × g
Weight
Mass
g
g
The relationship between Weight and Mass is that
(g≈ N/kg)
10
What can we use to weigh objects
A scale.
Weight
A scale measures the w______ of an object, which is often displayed as m___ (in kilograms) for convenience.
eight
ass
What is the unit of the scale
It is usually kilograms (kg) or .
grams(g)
Weight/Gravity N
kg
Mass is the amount of matter
in an object.
Mass
What is mass
Let’s weigh something with a scale.
Object Mass(g)
orange
grape
candy
stone
The mass of the _______ is ____g.
orange
Weight(N)
The weight of the ________ is ____N.
On the Earth, W = m×g (g ≈ 10 N/kg)
The Moon
The Earth
600N
N
100 N
So the gravity on the Earth is ____ times that on the Moon.
six
Let’s
Compare
Which planet is better for jumping
Compare weights
Object Mass(g) Weight on the Earth Weight
on the Moon
orange
grape
candy
stone
=
Mass has the ________ value anywhere.
Weight has ___________ values according to places.
same
different
Gravity.xlsx
The two oranges hit the ground
at the _________ time.
Think : Does one fall faster
M1 _______ M2
≈
from the same height
same
Which one will hit the ground first
Think : Does one fall faster
The orange hits the ground first.
The grape hits the ground first.
Both hit the ground at the same time.
What about an orange and a grape Which one will hit the ground first
from the same height
Will they hit the ground at the same time
Yes. All of them hit the ground at the same time.
from the same height
Think : Does one fall faster
How about an orange and a feather
from the same height
Think : Does one fall faster
In the first case, the feathers fell to the ground at a slower rate than the bowling ball because of __________________.
from the same height
air resistance
Think : Does one fall faster
In a vacuum(真空), the feathers and the bowling ball fell to the ground
at the _______ time .
from the same height
same
On the Earth, when air resistance is ignored, any object falling from the _____________________ will hit the ground at the _________________.
We can conclude that:
same height
same time
from the same height
Summary Report
Gravity causes _______, and their unit is _________. Gravity has a _________ and a _______, but weight only has a _______. The unit of mass is ____________ or ________. On the Earth, we can calculate weight by the rule: _________. Without air, heavy and light things falling from the ____________ will land at the ____________.
weight
Newton
direction
value
value
kilogram(kg)
gram(g)
W=m×g
same height
same time
Homework:Written Homework:Write a short story describing how life scenes would change.Title: If Gravity Suddenly DisappearedExploration Homework:Look up information about the gravity of other planets, make a simple comparison with Earth's gravity, and share it in the next class.以“Gravity”为核心概念，通过“现象观察---科学建模---跨学科应用”的探究链设计教学。
国际课程理念融合
采用“英语术语输入+中文思维辅助”的渐进式双语模式。
双语教学创新
引入国际通用的科学探究方法，如“控制变量法”（对比真空与非真空下落）、“数据可视化”（表格），使用国际单位制规范测量。
实验设计国际化
教学特色
通过PPT动态演示（如月球重力对比）和实物实验（弹簧秤测量），有效突破“质量不变而重量可变”的认知难点，85%的学生能正确区分“mass”与“weight”的英语表述，并理解其物理含义上的区别。
成功之处
教学反思

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